Penalty for striking (4)
I believe the answer is:
fine
I believe this clue is a double definition.
'penalty' is the first definition.
(I've seen this before)
'striking' is the second definition.
(thesaurus)
'for' is the link.
(Other definitions for fine that I've seen before include "Eric" , "Capital - punishment" , "Suitable" , "No special brandy" , "nice > brandy" .)