Congers and kin (4)
I believe the answer is:
'congers and kin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eels that I've seen before include "Odd fish found in the lees" , "Feels small imprisoning water creatures" , "Anguillae" , "Slender fish" , "Abstract nineteen sixties style" .)