Husband of Persephone (5)
I believe the answer is:
hades
'husband of persephone' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hades that I've seen before include "Infernal situation" , "Underworld, hell" , "The underworld where the souls of the dead live" , "The nether world, hell" , "Greek god of the underworld" .)