Son of Jacob and Leah (4)
I believe the answer is:
levi
'son of jacob and leah' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for levi that I've seen before include "Jewish priestly tribe" , "Tribe of Israel" , "Hebrew patriarch - Italian writer" , "Matthew the apostle" , "Biblical priest" .)