Crossword Genius

Fish that’s rotten brought up (3)

Ross

I believe the answer is:

dab

'fish' is the definition.
(dab is a type of fish)

'rotten brought up' is the wordplay.
'rotten' becomes 'bad' (similar in meaning).
'brought up' is a reversal indicator (in a down clue, letters go up).
'bad' written backwards gives 'DAB'.

'that's' acts as a link.

(Other definitions for dab that I've seen before include "Gently wipe" , "Bad kind of fish" , "Flounder" , "Flatfish; fingerprint" , "Fingerprint - fish" .)

I've seen this clue in The Times.
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