Blow caught hooligan (5)
I believe the answer is:
clout
'blow' is the definition.
(I know that clout is a type of blow)
'caught hooligan' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'hooligan' becomes 'lout' (both can mean an aggressive person).
'c'+'lout'='CLOUT'
(Other definitions for clout that I've seen before include "Hit - influence" , "Influence; heavy blow" , "Smack - influence" , "Cast not one before May is out" , "strike" .)