Biblical patriarch's two separate accounts (5)
I believe the answer is:
isaac
'biblical patriarch's' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for isaac that I've seen before include "boy almost meeting early death" , "Esau's father" , "According to the book, twins' dad" , "-- Asimov, sci-fi author" , "Hebrew patriarch" .)