Phantom, apparition (7)
I believe the answer is:
spectre
I believe this is a double definition.
'phantom' is the first definition.
(I know that spectre is a type of phantom)
'apparition' is the second definition.
(I know that spectre is a type of apparition)
(Other definitions for spectre that I've seen before include "Ghostly figure" , "spirit" , "Ghost, phantom, apparition" , "something seen as a threat" , "Respect for a ghost" .)