Blow caught ruffian (5)
I believe the answer is:
clout
'blow' is the definition.
(thesaurus)
'caught ruffian' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'ruffian' becomes 'lout' (I've seen this before).
'c'+'lout'='CLOUT'
(Other definitions for clout that I've seen before include "Cast not one before May is out" , "Cuff" , "Political influence - flat-headed nail" , "A blow; powerful influence" , "Sock" .)