Spook (5)
'spook' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for ghost that I've seen before include "suggestion" , "author for someone" , "Lay down life for another in this" , "Hamlet's spectral father" , "give it up" .)
'spook' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for unsettle that I've seen before include "Fluster" , "'Disturb, make uneasy (8)'" , "Discompose" , "Throw" , "Upset" .)