NYC borough (9)

I believe the answer is:

manhattan

(Other definitions for manhattan that I've seen before include "Vermouth and whisky cocktail - New York borough" , "Cocktail of whiskey and sweet vermouth" , "Island of New York - cocktail" , "NY borough" , "Vermouth and whiskey, with a dash of bitters" .)

I've seen this clue in the Sydney Morning Herald.

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