Relish drink (5)
I believe the answer is:
sauce
This clue is a double definition.
'relish' is the first definition.
(I've seen this before)
'drink' is the second definition.
(thesaurus)
(Other definitions for sauce that I've seen before include "What's ... for the goose is ... for the gander" , "Dressing served with food" , "Relish or impertinence" , "Cause for relish" , "Cheek; condiment" .)