"Ain't gonna happen"

I think it could be either:

Which length description are you looking for?:

nohow

'ain't gonna happen' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for nohow that I've seen before include "Under no circumstances (as Tweedledum said)" , "Definitely not" , "Absolutely not in America" , "Not by any means, informally" , "Not at all in US" .)

I've seen this clue in The New York Times.

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