Pharaoh in "The Ten Commandments"
I believe the answer is:
rameses
'pharaoh in the ten commandments' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rameses that I've seen before include "Ancient king" , "Egyptian pharaoh" , "See Mars (anag) - Pharaoh" , "Name of several ancient Egyptian rulers - ear mess (anag)" , "Egyptian king" .)