Composers' realm of old New York (3,3,5)

I believe the answer is:

tin pan alley

(Other definitions for tin pan alley that I've seen before include "music came out of this" , "Name for the realm of popular music production" , "District concerned with production of popular music - commercial side of pop music" , "New York City district for popular musicians" , "Realm of popular music producers" .)

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

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