Tipple, shot (4)
I believe the answer is:
dram
I believe this is a double definition.
'tipple' is the first definition.
(thesaurus)
'shot' is the second definition.
(of whisky say)
(Other definitions for dram that I've seen before include "Measure of spirits" , "Small drink of alcohol" , "Small drink (in Scotland)" , "Wee drop of whisky?" , "Pick-me-up" .)