Bogeyman (5)
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I believe the answer is:
ghoul
'bogeyman' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for ghoul that I've seen before include "Evil presence" , "Spirit that robs graves and devours corpses" , "Evil spirit or phantom" , "Corpse-loving phantom" , "Macabre fiend" .)