Crossword Genius

Signal approval (3)

Ross

I believe the answer is:

nod

'signal approval' 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 "Lower one's head" , "Drowse" , "Signify assent" , "OT land" , "Sign of assent or salutation" .)

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