"Brass in Pocket" (also known as "Brass in Pocket (I'm Special)") is a single by The Pretenders.
 It was written by Chrissie Hynde and James Honeyman-Scott, and produced by Chris Thomas.
Christine Ellen "Chrissie" Hynde (born September 7, 1951) is an American musician who is best known as a founding member of the rock band The Pretenders.
Bill Muter (born June 8, 1984) is an American tuba player, educator, author and composer from South Florida.
 Muter is arguably best known for his music technique book titled "A Practical Approach: Brass Pedagogy Book."
 In the month of its release, A Practical Approach was one of the bestselling books on Apple's iBookstore Music Book Charts, topping the Beatles Songbook and the popular Real Book.
 A Practical Approach has also been fully translated into Japanese.
 In 2012, Muter toured to all 47 prefectures in Japan promoting his book in association with Blast!
, Kyodo Tokyo and BrassTribe Magazine.
 Along with "A Practical Approach", Muter is also a contributing author of pedagogy materials to the International Tuba-Euphonium Association and has presented as a clinician and soloist at the ITEA Midwest Conference.
 Muter's works have also gained notoriety in Brass Musician Magazine and The New Times.
George Vital "Papa Jack" Laine (September 21, 1873 – June 1, 1966) was an American musician and a pioneering band leader in New Orleans in the years from the Spanish–American War to World War I.
 He was often credited for training many musicians which would later become successful in jazz music.
 His Marching band was named Reliance Brass Band and it was the first to fuse European, African and Latin music together.
 The earliest jazz musicians can be traced back to playing within the Reliance Brass Band or being influenced from those who had.
Avant-pop (or avantpop) is an American artistic movement which derived from postmodernism in the 1990s.
 The name of the movement has been taken by Larry McCaffery from the homonymous 1986 album by American jazz musician Lester Bowie ("Avant Pop - Brass Fantasy"), where pop tunes are scored for a brass ensemble.
Takeshi "Tak" Shindo (November 11, 1922 – April 17, 2002) was a Japanese American musician, composer and arranger.
 He was one of the prominent artists in the exotica music genre during the late 1950s and early 1960s.
 Shindo also founded a dance band in 1947 and was a frequent lecturer and writer on Japanese music.
 He first gained prominence for his work on the 1957 motion picture "Sayonara," served as the musical director for the television series "Gunsmoke," and composed theme music for "The Ed Sullivan Show" and "Wagon Train."
 He is most remembered for the exotica albums he released from 1958 to 1962, including "Mganga!
 The Primitive Sounds of Tak Shindo" (1958), "Brass and Bamboo" (1959) and "Accent on Bamboo" (1960).
 He also released several albums in Japan during the mid-1960s that blended American and Japanese musical traditions.
 In 1980, he made a documentary film, "Encounter with the Past," about the Manzanar relocation camp where he was relocated in 1942 as part of the Japanese American internment policy.
Herb Alpert (born March 31, 1935) is an American jazz musician most associated with the group variously known as Herb Alpert & the Tijuana Brass, Herb Alpert's Tijuana Brass, or TJB.
 Alpert is also a recording industry executive, the "A" of A&M Records, a recording label he and business partner Jerry Moss founded and eventually sold to PolyGram.
 Alpert also has created abstract expressionist paintings and sculpture over two decades, which are publicly displayed on occasion.
 Alpert and his wife, Lani Hall, are substantial philanthropists through the operation of the Herb Alpert Foundation.
"Circus Left Town", also known as "Circus" is a ballad written by the British recording artist Eric Clapton.
 The rock musician wrote the song about the last night he spent with his then four-year-old son Conor.
 Although Clapton played and recorded the song for his 1992 million seller live album "Unplugged", he decided to release the title six years later as a re-recording for both his 1998 effort "Pilgrim" and as a single release.
 However, Clapton played the song live for his 1992 Eric Clapton World Tour, before it came out on any recording formats.
The sousaphone ( ), is a brass instrument in the same family as the more widely known tuba.
 Created around 1893 by J.W. Pepper at the direction of American bandleader John Philip Sousa (whom the instrument was then named after), it was designed to be easier to play than the concert tuba while standing or marching, as well as to carry the sound of the instrument above the heads of the band.
 Like the tuba, sound is produced by moving air past the lips, causing them to vibrate or "buzz" into a large cupped mouthpiece.
 Unlike the tuba, the instrument is bent in a circle to fit around the body of the musician; it ends in a large, flaring bell that is pointed forward, projecting the sound ahead of the player.
 Because of the ease of carrying and the direction of sound, it is widely employed in marching bands, as well as various other musical genres.
 Sousaphones were originally made out of brass but in the mid-20th century started to be made from lighter materials like fiberglass; today both types are in wide use.
James Andrews (born January 12, 1969) is an American musician from New Orleans.
 He hails from a musical family; he is the grandson of Jesse Hill, older brother (and mentor) to Troy Andrews (better known by his stage name of “Trombone Shorty”), and cousin to Glen David Andrews and the late Travis “Trumpet Black” Hill.
 A trumpeter and vocalist, Andrews has the nickname “Satchmo of the Ghetto.”
 Raised in the Tremé neighborhood, Andrews played in a number of brass bands, including the Treme Brass Band, Junior Olympia Brass Band, and the New Birth Brass Band, before launching his own band, James Andrews and the Crescent City Allstars.
 He also played with multi-instrumentalist Danny Barker.
 In 1998, he released the album "Satchmo of the Ghetto," which was produced by Allen Toussaint and featured Dr. John on all 11 tracks.

Question: Which American musician wrote Brass in Pocket
Answer: Christine Ellen "Chrissie" Hynde