So hot right now (10)

I think it could be either:

Which length description are you looking for?:

3,3,4

all the rage

'so hot right now' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for all the rage that I've seen before include "Very popular (informal)" , "Fashionable" , "Very much in fashion" , "The in thing" , "Extremely popular" .)

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

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