Wraith (7)
'wraith' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for spectre that I've seen before include "Ghostly figure" , "after-image?" , "Respect for a ghost" , "Wraith" , "'Phantom, shade (7)'" .)
'wraith' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for phantom that I've seen before include "RR" , "shadow of his former self?" , "Illusion (at the opera?)" , "Ballet-dancing costume" , "Apparition, spectre" .)