Crossword Genius

Small mammal that lives mostly underground

Ross

I believe the answer is:

mole

(Other definitions for mole that I've seen before include "A spy within an organisation" , "Spy; burrower" , "Spy, skin spot and furry animal" , "Furry burrowing animal" , "Small burrowing animal" .)

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