Singapore sling ingredient (3)
I believe the answer is:
gin
'singapore sling ingredient' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gin that I've seen before include "Animal trap or alcoholic drink" , "Common spirit" , "Machine for separating cotton from its seeds" , "Trap; mother's ruin" , "Clear alcoholic drink" .)