Feel sentimental about fish (4)

I believe the answer is:

eels

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

'feel sentimental about' is the wordplay.
'about' says the answer is hidden in the clue.
'EELS' is hidden within 'feel sentimental'.

(Other definitions for eels that I've seen before include "Slippery creatures" , "Conger --; jellied --" , "Odd fish found in the lees" , "Abstract nineteen sixties style" , "Water snakes twisting in lees" .)

I've seen this clue in The Mirror.

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