First victim President succeeding James B? (4)
I believe the answer is:
abel
'first victim' is the definition.
(Abel was murdered by his brother Cain in the Bible)
'president succeeding james b?' is the wordplay.
'president' becomes 'Abe' (Abraham (Abe) Lincoln).
'succeeding james b?' becomes 'l' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'abe'+'l'='ABEL'
Can you help me to learn more?
(Other definitions for abel that I've seen before include "Eve's son" , "Brother killed by Cain" , "Cornish city" , "One of the first children" , "Old Testament brother" .)