Fish that may be smoked or else stewed (4)
I believe the answer is:
eels
'fish that may be smoked' is the definition.
'eels' can be an answer for 'fish' (eel is a type of fish). I'm unsure of the remainder of the definition.
'else stewed' is the wordplay.
'stewed' is an anagram indicator.
'else' anagrammed gives 'EELS'.
'or' is the link.
Can you help me to learn more?
(Other definitions for eels that I've seen before include "Snakelike fish" , "Elongated fish" , "Snakelike fishes" , "Odd fish found in the lees" , "Conger --; jellied --" .)