New York (3,5)
I believe the answer is:
big apple
'new york' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for big apple that I've seen before include "New York's slang name" , "New York's fruity nickname" , "New York City (informal)" , "Large fruit in New York?" , "Informal name for New York" .)