Crazy swinger’s game beginning anew (7)
I believe the answer is:
bonkers
'crazy' is the definition.
(I've seen this before)
'swinger's game beginning anew' is the wordplay.
I cannot quite see how this works, but
'game' could be 'on' (both can mean willing) and 'on' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bonkers that I've seen before include "Barmy, crackers" , "Out to lunch" , "Mad, crazy" , "Lovers" , "bats" .)