Stop for a drink (6)
I believe the answer is:
scotch
I believe this is a double definition.
'stop' is the first definition.
(thesaurus)
'a drink' is the second definition.
(Scotch is an example)
'for' is the link.
(Other definitions for scotch that I've seen before include "Decisively put an end to" , "Alcoholic spirit" , "Kind of whisky spelt thus" , "Thwart - sort of broth, mist or egg" , "A short" .)