New York island (9)
I believe the answer is:
manhattan
'new york island' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for manhattan that I've seen before include "area of New York City" , "One of the five boroughs of New York City" , "New York City borough" , "NY borough" , "Cocktail consisting of whisky, vermouth and bitters" .)