Crossword Genius

Chew like chinchillas (4)

Ross

I believe the answer is:

gnaw

(Other definitions for gnaw that I've seen before include "Attack with teeth" , "Chew at, work with teeth" , "Bite persistently, grind" , "Eat at" , "Chew steadily at" .)

I've seen this clue in the Newsday.
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