Fish brought back from Fleetwood (3)
I believe the answer is:
eel
'fish' is the definition.
(eel is a kind of fish)
'brought back from fleetwood' is the wordplay.
'brought back' shows that the letters should be reversed in order.
'from' indicates the answer is hidden within the clue.
'lee' is hidden in the letters of 'fleetwood'.
'lee' backwards is 'EEL'.
(Other definitions for eel that I've seen before include "Unagi, in a sushi bar" , "Serpentine fish" , "Slippery type" , "Moray or electric, for instance" , "Slippery swimmer (may be jellied)" .)