Crossword Genius

Oscar of "Dune" (5)

Ross

I believe the answer is:

isaac

(Other definitions for isaac that I've seen before include "According to the book, twins' dad" , "Son almost sacrificed" , "Son of Abraham, offered as a sacrifice to God" , "Newton's first name" , "Sarah's son" .)

I've seen this clue in The Washington Post and The Wall Street Journal.
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