Drinking spree (6)
I believe the answer is:
bender
'drinking spree' is the definition.
(bender can mean a night of drinking)
This is all the clue.
(Other definitions for bender that I've seen before include "A wild drinking session, doubles you up" , "A drinking spree - no wonder one is twisted" , "Wild drinking spree" , "Drinking jag" , "Slangy drinking spree - crooked result?" .)