Crazy children’s game needs new beginning (7)
I believe the answer is:
bonkers
'crazy' is the definition.
(I've seen this before)
'children's game needs new beginning' is the wordplay.
I cannot really understand how this works, but
'game' could be 'on' (both can mean willing) and 'on' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bonkers that I've seen before include "Slang for crazy, off the wall" , "bats" , "Completely mad" , "Barmy, crackers" , "touched..." .)