Member not so drunk (7)
I believe the answer is:
legless
'drunk' is the definition.
(I know that drunk can be written as legless)
'member not' is the wordplay.
'member' becomes 'leg' (member can mean a limb).
'not' becomes 'less' (I've seen this in other clues).
'leg'+'less'='LEGLESS'
'so' acts as a link.
(Other definitions for legless that I've seen before include "Slangily drunk, lacking lower limbs" , "high" , "Such a person cannot stand" , "under the table" , "Like snakes; drunk" .)