Ghostly, eerie (9)

I believe the answer is:

unearthly

I believe this clue is a double definition.

'ghostly' is the first definition.
(thesaurus)

'eerie' is the second definition.
(thesaurus)

(Other definitions for unearthly that I've seen before include "Disturbingly mysterious" , "Preposterous" , "Not of this world, supernatural" , "Mysterious and disturbing" , "Heavenly or ghostly" .)

I've seen this clue in the Sydney Morning Herald.

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