Large drink put out for cheat (6-5)
I believe the answer is:
double-cross
'cheat' is the definition.
(thesaurus)
'large drink put out' is the wordplay.
'large drink' becomes 'double' (drink with a double shot).
'put out' becomes 'cross' (both can mean angry or irritated).
'double'+'cross'='DOUBLE-CROSS'
'for' acts as a link.
(Other definitions for double-cross that I've seen before include "Deceive supposed ally" , "Deceive person one is supposedly helping" , "Deceive (an ally, maybe)" , "Cheat - betray" , "Sell down the river" .)