Unearthly (5)
'unearthly' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eerie that I've seen before include "Spooky, macabre" , "Spooky, supernatural" , "Bloodcurdling" , "Frighteningly odd" , "Strangely frightening" .)
'unearthly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alien that I've seen before include "Foreigner, outsider" , "Foreign, strange" , "extraneous" , "Foreign - film directed by Ridley Scott" , "Outlandish" .)