Spoils time at the crease with Warwickshire's opener (8)
I believe the answer is:
winnings
'spoils' is the definition.
(I've seen this before)
'time at the crease with warwickshire's opener' is the wordplay.
'time at the crease' becomes 'innings' (I've seen this before).
'with' says to put letters next to each other.
'opener' says to take the initial letters.
The initial letter of 'warwickshire' is 'w'.
'innings' put after 'w' is 'WINNINGS'.
(Other definitions for winnings that I've seen before include "Profits from gambling" , "Spoils" , "Punter's takings" , "pounds gained, say" , "Money made at gambling" .)