Crossword Genius

Approve without speaking (3)

Ross

I believe the answer is:

nod

(Other definitions for nod that I've seen before include "Move head in agreement" , "Cain left Eden for the Land of . . ." , "Indicate 25 [YES]" , "Tacit agreement" , "Be agreeably" .)

I've seen this clue in The Wall Street Journal.
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