Crossword Genius

Caviar fish (8)

Ross

I think it could be either:

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4

8

sturgeon

'caviar fish' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for sturgeon that I've seen before include "Source of caviare and isinglass" , "Source of caviar" , "Large fish, valued for its roe" , "Caviar supplier" , "Fish sought for caviar" .)

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