Outlawed group for the audience (6)
I believe the answer is:
banned
'outlawed' is the definition.
(banning is a kind of outlawing)
'group for the audience' is the wordplay.
'group' becomes 'band' (band is a kind of group).
'for the audience' shows a homophone (sound like).
'band' sounds like 'BANNED'.
(Other definitions for banned that I've seen before include "Forbidden by law" , "Prohibited officially" , "Legally prohibited" , "Censored" , "Barred" .)