Exploit recalled framing a wronged brother (4)
I believe the answer is:
esau
'wronged brother' is the definition.
(biblical figure wronged by his brother Jacob)
'exploit recalled framing a' is the wordplay.
'exploit' becomes 'use' (use can mean to exploit).
'recalled' shows that the letters should be reversed in order.
'framing' means one lot of letters goes inside another (inserted letters are framed by the outside letters).
'use' back-to-front is 'esu'.
'esu' placed around 'a' is 'ESAU'.
(Other definitions for esau that I've seen before include "Birthright seller (Bible)" , "Old Testament character sounds as if he had a vision" , "One of Isaac's sons" , "Rebecca's son" , "Biblical hunter" .)