Crossword Genius

Freshwater mammal (5)

Ross

I believe the answer is:

otter

'freshwater mammal' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for otter that I've seen before include "Aquatic creature" , "fish-eater displayed" , "Freshwater brown carnivore" , "Holt dweller" , "carnivore is concerned" .)

I've seen this clue in The Independent, the Evening Standard and The Mirror.
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