Winter setting in NYC (3)

I believe the answer is:

est

'winter setting in nyc' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for est that I've seen before include "Suffix showing superlative" , "self-improvement programme" , "psychological programme" , "Time Americans adopted" .)

I've seen this clue in the Universal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.