Crossword Genius

Caviar source (6)

Ross

I believe the answer is:

beluga

'caviar source' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for beluga that I've seen before include "Small northern white whale" , "Large caviare-yielding sturgeon" , "Large Russian sturgeon" , "Species of sturgeon" , "Great Russian sturgeon - Arctic whale" .)

I've seen this clue in The Times and The Sunday Times.
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