Unable to sit still (5)

I think it could be either:

Which length description are you looking for?:

antsy

'unable to sit still' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for antsy that I've seen before include "nervous" , "excited?" , "Eager" .)

I've seen this clue in the USA Today and the Newsday.

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