Crossword Genius

Wordless consent (3)

Ross

I believe the answer is:

nod

(Other definitions for nod that I've seen before include "Show agreement (or sleepiness?)" , "Signify assent" , "Fellow that's set up number 500" , "Affirmative action?" , "Indicate 25 [YES]" .)

I've seen this clue in the LA Times.
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