Crossword Genius

Grind, as one's teeth (5)

Ross

I believe the answer is:

gnash

'grind as one's teeth' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for gnash that I've seen before include "Grind one's teeth" , "champ" , "Grind away" , "grate" , "grinding action" .)

I've seen this clue in The New York Times.
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