Long thin fish (3)
'long thin fish' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eel that I've seen before include "Proverbially slippery fish" , "Snake-like sea creature" , "Conger, e.g." , "A sea snake" , "Elongated fish" .)
'long thin fish' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for eels that I've seen before include "Odd fish found in the lees" , "Conger --; jellied --" , "Slender fishes" , "Lengthy fish" , "Sea snakes among lees" .)