Crossword Genius

Fish people oddly want? (7)

Ross

I believe the answer is:

pollack

'fish' is the definition.
(pollack is a kind of fish)

'people oddly want?' is the wordplay.
'oddly' means one should take alternating letters.
'want?' becomes 'lack' (wanting is a kind of lacking).
The alternating letters of 'people' are 'pol'.
'pol'+'lack'='POLLACK'

(Another definition for pollack that I've seen is " Food fish of the cod family".)

I've seen this clue in The Telegraph.
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