In 1964, Clarke formed Stonewall Blues Band with his school friends and performed at local youth clubs.

In 1966, he left Rutlish Grammar School and joined Advision Studios as an assistant engineer where he worked on sessions with Vic Flick, Big Jim Sullivan, Jimmy Page, Graham Bond and others.

Later that year, the band toured to multiple locations in England alongside Howlin' Wolf, Otis Spann and Freddie King.

[8] Killing Floor toured in Europe several times, and played with The Nice and Black Sabbath at the Hamburg Easter Festival in 1970.

[9] In October 1971, Clarke joined Funky Fever, a rock band formed by Lenny Zakatek and toured extensively with them to Germany and the United Kingdom.

[14] Between 1986 and 1989, Clarke toured to the United States with his band and performed at various locations including concerts with C. J. Chenier and Linda Hopkins in Los Angeles, California, with Johnny Winter in Olympia, Washington and with Canned Heat in Eugene, Oregon.

[19] Roll Again featuring Chris Sharley, Lou Martin and Dave Newman was released on Taxim Records and BGO in 1995.

In 2004, Killing Floor recorded and released their reunion album, Zero Tolerance featuring all the band members including Clarke.

Later that year, Clarke embarked on the project for reforming SALT and subsequently an album, The Cobra's Melodies, was released featuring all the band members.