Old Testament father of Jacob and Esau (5)

I believe the answer is:

isaac

(Other definitions for isaac that I've seen before include "Stern" , "Youth almost sacrificed" , "Father of 21" , "Biblical father of twins" , "According to the book, twins' dad" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.