Question: What guitarist worked with both Earl Slick and Siouxsie and the Banshees?

Context paragraphs:
Robert Smith (musician): Robert James Smith (born 21 April 1959) is an English singer, songwriter and musician.  He is the lead singer, guitarist, lyricist and principal songwriter of the rock band the Cure.  He is the band's only constant member since its formation in 1976.  He has also played guitar in the band Siouxsie and the Banshees.  Smith is a multi-instrumentalist, known for his unique stage look and distinctive voice.

Siouxsie Sioux: Susan Janet Ballion, better known by her stage name Siouxsie Sioux (/ˈsuːziː suː/ , born 27 May 1957), is an English singer, songwriter, musician and producer.  She is best known as the lead singer of the alternative rock band Siouxsie and the Banshees (1976–1996) and the drums-and-voice duo the Creatures (1981–2005).  Siouxsie and the Banshees released 11 studio albums and several UK Top 20 singles including "Hong Kong Garden", "Happy House", "Peek-a-Boo", plus a US Billboard Top 25 hit "Kiss Them for Me".  With the Creatures, Siouxsie recorded four studio albums and the hit single "Right Now".  She has also sung with artists such as Morrissey and John Cale.  After disbanding the Creatures in the mid-2000s, she has continued as a solo artist and released "Mantaray" in 2007.

The Spitfire Boys: The Spitfire Boys were the first Liverpool punk band to release a single ("British Refugee" c/w "Mein Kampf").  The Spitfire Boys were mainly notable for including in their line-up Peter Clarke, who went on to drum for The Slits and later Siouxsie and the Banshees (as well as marrying Siouxsie of the Banshees) as Budgie, and Paul Rutherford, later better known for being a member of 1980s pop band Frankie Goes to Hollywood.  Jones (aka guitarist David Littler) went on to join The Photons, which also included Steve Strange (Visage) and Vince Ely (The Psychedelic Furs).

Siouxsie and the Banshees: Siouxsie and the Banshees were an English rock band, formed in London in 1976 by vocalist Siouxsie Sioux and bass guitarist Steven Severin.  Initially associated with the English punk rock scene, the band rapidly evolved to create "a form of post-punk discord full of daring rhythmic and sonic experimentation".  In 1978, they released their critically acclaimed debut album, "The Scream", and built their reputation over the next few years through subsequent releases.  With "Juju" in 1981, the group also became an important influence on the emerging gothic rock scene.  They disbanded in 1996, with Siouxsie and drummer Budgie continuing to record music as the Creatures, a second band they had formed in the early 1980s.  In 2004, Siouxsie began a solo career.

Earl Slick: Earl Slick (born Frank Madeloni in Brooklyn, New York, October 1, 1952) is a guitarist best known for his collaborations with David Bowie, John Lennon, Yoko Ono, and Robert Smith.  He has also worked with other artists including John Waite, Tim Curry and David Coverdale, in addition to releasing several solo recordings.

Hyæna: Hyæna is the sixth studio album by English rock band Siouxsie and the Banshees, released in 1984.  The opening track, "Dazzle", featured strings played by a 27-piece orchestra called the "Chandos Players"; it was scored from a tune that Siouxsie Sioux composed on piano.  "Hyæna" is the only studio album that guitarist Robert Smith of The Cure composed and recorded with Siouxsie and the Banshees.

Phantom, Rocker &amp; Slick: Phantom, Rocker & Slick was an American rock band active in the mid-1980s.  The bandmembers were drummer Slim Jim Phantom, bassist Lee Rocker, and guitarist Earl Slick.  Phantom and Rocker had previously played together as members of the Stray Cats.  They released two albums, "Phantom, Rocker & Slick" and "Cover Girl", on EMI Records before disbanding.

Siouxsie and the Banshees personnel: Siouxsie and the Banshees went through several lineup changes throughout their history.  Vocalist Siouxsie Sioux and bassist Steven Severin were the only original members that remained from beginning to end.  Kenny Morris was the drummer of the group's first major incarnation; Budgie replaced him in late 1979.  The Banshees had several guitarists, including John McKay, John McGeoch, Robert Smith, John Valentine Carruthers, Jon Klein and Knox Chandler.  From mid-1987, Siouxsie and the Banshees became a quintet with the addition of multi-instrumentalist Martin McCarrick.

The Creatures: The Creatures were a band formed in 1981 by Siouxsie and the Banshees members Siouxsie Sioux and Budgie.  With the dissolution of Siouxsie and the Banshees in 1996, the Creatures graduated from an occasional project to a full-time concern.  The drum and voice duo released four studio albums: "Feast" in 1983, "Boomerang" in 1989, "Anima Animus" in 1999 and "Hái! " in 2003.

Face to Face (Siouxsie and the Banshees song): "Face to Face" is a song recorded by English rock band Siouxsie and the Banshees.  It was composed by the group along with Danny Elfman and was produced by Stephen Hague.  The track was featured in the 1992 film, "Batman Returns", and included on its soundtrack.  Elfman also composed the score for the film.  The track also appeared on the band 1992's compilation album "" and was remastered in 2002 for "The Best of Siouxsie and the Banshees".

Supporting paragraphs: Earl Slick Robert Smith (musician)
Answer: Robert Smith