Clubs brawl — it could be afters (7)
I believe the answer is:
crumble
'it could be afters' is the definition.
(type of afters or dessert)
'clubs brawl' is the wordplay.
'clubs' becomes 'c' (abbreviation in card games).
'brawl' becomes 'rumble' (both can mean a fight).
'c'+'rumble'='CRUMBLE'
(Other definitions for crumble that I've seen before include "Fall to bits; a pudding" , "Break up - fruit dish" , "Break down, fall apart" , "(To) fragment; pudding" , "Break up - pudding" .)