Crossword Genius

Unique fish (4)

Ross

I believe the answer is:

sole

I believe this clue is a double definition.

'unique' is the first definition.
(synonyms)

'fish' is the second definition.
(I know that sole is a type of fish)

(Other definitions for sole that I've seen before include "Lone; part of foot" , "Dover - -" , "Bottom of the foot" , "swimmer" , "Fish - alone" .)

I've seen this clue in The Irish Independent.
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