Crossword Genius

Move restlessly, following unintroduced thingamyjig (6)

Ross

I believe the answer is:

fidget

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'move restlessly' is the definition.
(synonyms)

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(Other definitions for fidget that I've seen before include "Make small restless movements with hands" , "Betray boredom, impatience" , "Move restlessly" , "Squirm" , "person always on the move" .)

I've seen this clue in The Independent.
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