Borough of New York and a cocktail (9)
I believe the answer is:
manhattan
'borough of new york and a cocktail' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for manhattan that I've seen before include "area of New York City" , "New York City borough" , "intoxicating drink" , "One of the five boroughs of New York City" , "NY borough" .)