Crossword Genius

Furry South American rodent (5)

Ross

I believe the answer is:

coypu

(Other definitions for coypu that I've seen before include "Animal -- source of nutria fur" , "Large South American aquatic rodent" , "Creature in fur coat" , "aquatic mammal" , "Beaver-like creature" .)

I've seen this clue in The Guardian.
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