Drink used to be provided (8)
I believe the answer is:
supplied
'be provided' is the definition.
(thesaurus)
'drink used' is the wordplay.
'drink' becomes 'sup' (I've seen this before).
'used' becomes 'plied' (plying is a kind of using).
'sup'+'plied'='SUPPLIED'
'to' acts as a link.
(Other definitions for supplied that I've seen before include "Made available" , "Furnished, provided" .)