Prince of Darkness (9)
There are a few possibilities for this:
beelzebub
'prince of darkness' is the definition.
(synonyms)
This is all the clue.
(Other definitions for devil that I've seen before include "Lived with Satan" , "Powerful evil spirit" , "Imp" , "Beelzebub, Satan" , "Wicked spirit" .)
'prince of darkness' is the definition.
(synonyms)
This is all the clue.
(Other definitions for satan that I've seen before include "Old Nick, Lucifer or Beelzebub" , "Fiend" , "Diabolical figure" , "Prince of Darkness" , "The devil, Beelzebub" .)
'prince of darkness' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for beelzebub that I've seen before include "Prince of Darkness" , "Demon or devil" , "Tempter of mankind; master of Hell" , "Satan" , "A devil, 'Lord of the Flies'" .)