Uncle of Joseph (4)
I believe the answer is:
esau
'uncle of joseph' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for esau that I've seen before include "Jacob's twin (Bible)" , "Isaac's hairy son" , "Elder of the twin sons of Isaac and Rebecca" , "Jacob's twin brother" , "Old Testament character sounds as if he had a vision" .)