Weird, scary (5)
I believe the answer is:
eerie
I believe this clue is a double definition.
'weird' is the first definition.
(both can mean strange or unsettling)
'scary' is the second definition.
(I've seen this in another clue)
(Other definitions for eerie that I've seen before include "Frighteningly odd" , "Strangely frightening" , "Spooky, supernatural" , "Mysterious" , "Strange, frightening" .)