He's said to have given Abel 'stick'
I believe the answer is:
cain
'he's said to have given abel stick' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for cain that I've seen before include "Biblical killer" , "First son" , "The first known murderer" , "Slayer of Abel" , "First murderer reported in the Bible" .)