An inability to keep still that betokens dishonesty? (10)

I believe the answer is:

shiftiness

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'dishonesty?' is the definition.
(I know that shiftiness is a type of dishonesty)

I don't understand the remainder of the clue.

(Other definitions for shiftiness that I've seen before include "Evasive quality" , "trickery" .)

I've seen this clue in the Evening Standard.

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