Game for a striker (5)
I believe the answer is:
match
This clue is a double definition.
'game' is the first definition.
(eg a football match)
'a striker' is the second definition.
(a match can be struck)
'for' is the link.
(Other definitions for match that I've seen before include "Partnership" , "Game; lighter" , "Lighter; contest" , "Formal contest - game" , "of little use when floodlights fail?" .)