Crossword Genius

Munched (6)

Ross

I believe the answer is:

gnawed

(Other definitions for gnawed that I've seen before include "Worried persistently" , "Chewed at like dog with bone" , "Bit persistently at something hard" , "Persistently nibbled" , "Wore away; champed" .)

I've seen this clue in The Telegraph and The Sun.
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