Darkness in which son moves, creating hell (5)
I believe the answer is:
hades
'hell' is the definition.
(I know that hell can be written as Hades)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hades that I've seen before include "It's hell in the Greek shade" , "Classical underworld" , "Infernal situation" , "gloomy place" , "The nether world, hell" .)