Unsettling (13)
'unsettling' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eerie that I've seen before include "Spooky, supernatural" , "Bloodcurdling" , "Frighteningly odd" , "Ghostly" , "Spooky, weird" .)
(Other definitions for scary that I've seen before include "[SPICE]" , "Alarming, maybe paranormal" , "Frightening or spooky" , "Fearsome" , "Hair-raising" .)
'unsettling' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for disconcerting that I've seen before include "Worrying" , "Unsettling" , "Such as puts one off one's stride" , "Off-putting" , "Such as will cause anxiety" .)
'unsettling' is the definition.
(both can mean sinister)
This is the entire clue.
(Other definitions for creepy that I've seen before include "Frightening or disturbing" , "horror" , "Causing feelings of fear or repulsion" , "Mysterious" , "Causing a feeling of fear or unease" .)