A good time (3)

I think it could be either:

Which length description are you looking for?:

fun

'a good time' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for fun that I've seen before include "Playful amusement" , "entertainment" , "Light-hearted pleasure" , "Entertaining" , "Enjoyment" .)

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

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