Question: The band Clock features P.J. Smith and a man that replaced what Def Leppard member?

full_context: Document 1: Perform.00: Perform.00 is a collection of Howard Jones favorites re-recorded by Jones and the backup band that accompanied him on tour to support his 1998 album People, and on the VH-1 Big Rewind tour of the late 90s (where he appeared on the same bill as The Human League and Culture Club). The bassist for the tours and on this album was Nick Beggs, known better as the bassist for Kajagoogoo. Drummer Kevin Wilkinson and guitarist Robin Boult also contributed to both projects.
Document 2: Gary Moore: Robert William Gary Moore (4 April 1952 – 6 February 2011) was a Northern Irish musician, most widely recognised as a singer, songwriter, and virtuoso rock and blues guitarist.
Document 3: Stevie Young: Stephen Crawford Young (born 11 December 1956 in Glasgow, Scotland) is a Scottish musician, and the rhythm guitarist and backing vocalist for the Australian hard rock band, AC/DC. He officially joined the band in September 2014, replacing his uncle, Malcolm Young who retired due to dementia. He had previously filled in for Malcolm on AC/DC's 1988 U.S. tour.
Document 4: Tim Sult: Tim Sult is the guitarist for hard rock band Clutch. He is also the guitarist for an instrumental side project, The Bakerton Group, and an occasional member of the reggae rock / stoner rock band Lionize, as well as recently formed band Deep Swell. Sult has remained the guitarist for Clutch since the group started in 1990.
Document 5: Scott Gorham: Scott Gorham (born William Scott Gorham, March 17, 1951, Glendale, California) is an American guitarist and songwriter who rose to international recognition as one of the "twin lead guitarists" for the Irish rock band, Thin Lizzy. Although not a founding member of Thin Lizzy, he served a continuous membership after passing an audition in 1974, joining the band at a time when the band's future was in doubt after the departures of original guitarist Eric Bell and his brief replacement Gary Moore. Gorham remained with Thin Lizzy until the band's breakup in 1984. He and guitarist Brian Robertson, both hired at the same time, marked the beginning of the band's most critically successful period, and together developed Thin Lizzy's twin lead guitar style while contributing dual backing vocals as well. Gorham is the band member with the longest membership after founders Brian Downey (drummer) and frontman and bass guitarist, Phil Lynott.
Document 6: Clock (band): Clock is a band featuring Def Leppard guitarist Vivian Campbell and P.J. Smith, who sang backing vocals on Def Leppard's cover of the Sweet song "Action" on Def Leppard's "Retro Active" (1993) album.
Document 7: Paul Dean (guitarist): Paul Warren Dean (born February 19, 1946 in Vancouver, British Columbia) is the lead guitarist for the Canadian rock band Loverboy which reached huge fame in the early 1980s.
Document 8: Simon Neil: Simon Alexander Neil (born 31 August 1979) is a Scottish vocalist, guitarist, and songwriter.
Document 9: Two Steps Behind: "Two Steps Behind" is a 1993 song by British hard rock band Def Leppard from their album "Retro Active" and Last Action Hero Soundtrack. It reached #5 on the Billboard Hot Mainstream Rock Tracks chart, and #12 on the "Billboard" Hot 100. In the 1993 Metal Edge Readers' Choice Awards, the song was voted "Song of the Year" and "Best Song From a Movie Soundtrack."
Document 10: Afrodiziak: Afrodiziak was a British singing group composed of Caron Wheeler, Claudia Fontaine, and later Naomi Thompson, that was active in the 1980s. As a duo, Wheeler and Fontaine were best known for performing backing vocals on The Jam's final single "Beat Surrender" in 1982 (with whom they also performed on their final tour) and Elvis Costello's 1983 album "Punch the Clock", especially its single, the international hit "Everyday I Write the Book". After the addition of a third member, Naomi Thompson, they went on to sing for acts such as Heaven 17 and Howard Jones. Afrodiziak performed backing vocals on the hit single Free Nelson Mandela, including the a cappella intro, staging it at The Tube (Channel4) in March 1984. Heaven 17's 1984 album, "How Men Are", featured them prominently, especially on the singles "Sunset Now" and "And That's No Lie". In 1984 and 1985 they performed on Madness's albums "Keep Moving" and "Mad Not Mad" respectively, also appearing in the video for the Madness single "Sweetest Girl". Also in 1985, they performed backing vocals on the first two songs on Howard Jones' second album, "Dream Into Action", both of which ("Things Can Only Get Better" and "Life in One Day") became worldwide hit singles; later that year, they went on tour as part of Jones' band. Other acts the group sang backup for include Japan, Ian Gillan, Aztec Camera, Maxi Priest, Aswad, Sam Brown, and Julia Fordham. Besides "The Tube", Afrodiziak also appeared on "Top of the Pops", "The Old Grey Whistle Test", "Solid Gold", and "American Bandstand". They performed live at the Montreux Jazz Festival, Live Aid Japan, Red Nose Day of Charity, and the first Free Nelson Mandela Concert.
Document 11: The Sweet: The Sweet (also known as Sweet) is a British glam rock band that rose to worldwide fame in the 1970s. Their best known line-up consisted of lead vocalist Brian Connolly, bass player Steve Priest, guitarist Andy Scott, and drummer Mick Tucker. The group was originally called Sweetshop.
Document 12: Vivian Campbell: Vivian Patrick Campbell (born 25 August 1962) is a Northern Irish rock guitarist. He came to prominence in the early 1980s as a member of Dio, and has been a member of Def Leppard since 1992 (replacing Steve Clark). Campbell has also worked with Thin Lizzy, Whitesnake, Sweet Savage, Trinity, Riverdogs, and Shadow King.
Document 13: Robert Sweet (musician): Robert Lee Sweet (born March 21, 1960 in Lynwood, California) is the drummer of the Christian metal band Stryper. He and his brother Michael founded the band as Roxx or Roxx Regime. Robert became known as the "Visual Time Keeper" for his wild drumming and captivating drum kits. Unlike most drummers, Sweet faces in the direction of stage left or right while playing, not straight ahead, so that the audience can see him and not have their view of him obscured by his drumkit. Sweet also played a key role in the visual direction of the band itself as well as being a significant contributor to the group.
Document 14: Ian Gillan: Ian Gillan (born 19 August 1945) is an English singer and songwriter. He originally found commercial success as the lead singer and lyricist for Deep Purple.
Document 15: Desert Song: "Desert Song" is a song by British hard rock band Def Leppard from their 1993 rarities and 'B-sides' album "Retro Active". This song was an outtake from the songwriting sessions that produced 1987's "Hysteria". Self-produced, it became one of the last songs to be released by Def Leppard bearing the songwriting and guitar-playing of Steve Clark, who died on 8 January 1991. It was a hit on U.S. rock radio, reaching number twelve on the Mainstream Rock Tracks chart. It was recorded as an instrumental for their album "Hysteria" (1987) but left off the album and was largely forgotten until the band decided to commit the song for "Retro Active". On a day off during their 7 Day Weekend Tour, Elliott composed lyrics whilst listening to the track. Elliott assembled the band and remains the only Def Leppard song to feature both Clark's guitar playing and Clark's successor Vivian Campbell on background vocals, although Campbell's contributions are uncredited in the "Retro Active" liner notes.
ground_truth: Steve Clark