Malevolent spirit or ghost (5)
I believe the answer is:
ghoul
I believe this clue is a double definition.
'malevolent spirit' is the first definition.
(I've seen this before)
'ghost' is the second definition.
(thesaurus)
(Other definitions for ghoul that I've seen before include "Morbid soul" , "Macabre fiend" , "malevolent spirit" , "Spirit that robs graves and devours corpses" , "Morbid voyeur" .)