Provide too many ways of gaining advantage in bowling technique (7)
I believe the answer is:
overarm
This clue is a double definition.
'provide too many ways of gaining advantage' is the first definition.
'bowling technique' is the second definition.
'in' acts as a link.
(Other definitions for overarm that I've seen before include "One way to deliver" , "sort of bowler" , "kind of delivery" , "Bowling style" , "bowler's approach?" .)