Crossword Genius

Positive motion (3)

Ross

I believe the answer is:

nod

'positive motion' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for nod that I've seen before include "Gesture of acceptance" , "Be agreeably" , "OT land" , "Signify agreement" , "It's said to be as good as a wink" .)

I've seen this clue in The Guardian and The Chronicle of Higher Education.
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