Cash for the game (5)
I believe the answer is:
ready
I believe this clue is a double definition.
'cash' is the first definition.
(I've seen this before)
'the game' is the second definition.
(thesaurus)
'for' is the link.
(Other definitions for ready that I've seen before include "Primed" , "Prepared, willing" , "All set to go" , "Suitably prepared" , "Available now" .)