First fratricide victim (4)
I believe the answer is:
abel
'first fratricide victim' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for abel that I've seen before include "Victim of 11" , "Son of Adam and Eve" , "Victim of murderer" , "The first recorded murder victim" , "Cain's victim; - Magwitch (Great Expectations)" .)