A nice, pure cocktail for connoisseur (9)
I believe the answer is:
epicurean
'connoisseur' is the definition.
(thesaurus)
'a nice pure cocktail' is the wordplay.
'cocktail' is an anagram indicator.
'a'+'nice'+'pure'='anicepure'
'anicepure' anagrammed gives 'EPICUREAN'.
'for' is the link.
(Other definitions for epicurean that I've seen before include "Hedonistic" , "Hedonist" , "Bon vivant" , "Foodie's" , "Gourmet" .)