____ rummy (3)
I believe the answer is:
gin
'rummy' is the definition.
(I know that gin is a type of rummy)
This is all the clue.
(Other definitions for gin that I've seen before include "Alcohol for the snare" , "A short" , "Liquor flavoured with juniper berries" , "Clear alcoholic drink" , "Juniper-flavoured spirit" .)