Before game, bishop gets drunk (6)
I believe the answer is:
blotto
'drunk' is the definition.
(slang term)
'before game bishop' is the wordplay.
I cannot quite see how this works, but
'game' could be 'lotto' (the UK National Lottery) and 'lotto' is found in the answer.
'bishop' could be 'b' (chess abbreviation) and 'b' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'gets' is the link.
Can you help me to learn more?
(Other definitions for blotto that I've seen before include "Smashed" , "Blind drunk" , "Tight" , "Slangily drunk - ready to bolt" , "Boot Lt. out for being drunk" .)