Big Apple borough (8)

I think it could be either:

Which length description are you looking for?:

brooklyn

'big apple borough' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for brooklyn that I've seen before include "New York borough with famous bridge." , "NYC borough, book and film" , "New York City borough" , "District and bridge in New York" , "Big Apple borough" .)

I've seen this clue in The Guardian.

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