Ancient Egyptian god, judge of the dead (6)
I believe the answer is:
osiris
This clue is a double definition.
'ancient egyptian god' is the first definition.
(I've seen this in another clue)
'judge of the dead' is the second definition.
(I've seen this in another clue)
(Other definitions for osiris that I've seen before include "Egyptian deity" , "one Egyptians worshipped" , "underworld boss" , "Egyptian god of the underworld" , "Egypt. god of dead" .)