"I kid you not!" (6)

I think it could be either:

Which length description are you looking for?:

honest

'i kid you not' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for honest that I've seen before include "Honorable and sincere" , "Open and truthful" , "Uncorrupt - open - genuine" , "Trustworthy or candid" , "'Fair-dealing, upright (6)'" .)

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

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