Crossword Genius

Source of tail winds? (4)

Ross

I believe the answer is:

wags

(Other definitions for wags that I've seen before include "Moves to and fro like dog's tail" , "Moves briskly to and fro with swag (4)" , "group with team players, esp when travelling" , "Habitual jokers" .)

I've seen this clue in the LA Times.
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