Win big -- strike target ball when playing bowls on grass (3,3,7)
I believe the answer is:
hit the jackpot
'win big' is the definition.
(I've seen this before)
'strike target ball when playing bowls on grass' is the wordplay.
I cannot quite see how this works, but
'strike' could be 'hit' (synonyms) and 'hit' is present in the answer.
'ball' could be 'jack' (type of ball in bowls) and 'jack' is located in the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
'grass' could be 'pot' (cannabis) and 'pot' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for hit the jackpot that I've seen before include "Strike it lucky" , "Have a big success or stroke of fortune" , "Win the big prize" , "Have a great and unexpected success" , "Achieve lucky success" .)