Drinking spree (6)
I believe the answer is:
bender
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drinking spree</span>' is the definition.<br/ ><span class="explanation-format__explanation">(bender can mean a night of drinking)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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?" .)