Eve's second son (4)
I believe the answer is:
abel
'eve's second son' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for abel that I've seen before include "Cain's victim; - Magwitch (Great Expectations)" , "The first murderee?" , "Adamson" , "Early murder victim" , "Slain biblical brother" .)