Suppressed recording of The Sex Pistols? (6)
I believe the answer is:
banned
'suppressed' is the definition.
'recording of the sex pistols?' is the wordplay.
'recording of' indicates a 'sounds like' (homophone) clue.
'the sex pistols?' becomes 'band' (the Sex Pistols are an example).
'band' is a homophone of 'BANNED'.
(Other definitions for banned that I've seen before include "Censored" , "expelled" , "Group on radio" , "Prohibited by censor" , "Legally prohibited" .)