Otherworldly, oddball heretic (7)

I believe the answer is:

etheric

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'otherworldly' is the definition.
Both the answer and definition are adjectives.
Perhaps you can see a link between them that I can't see?

'oddball heretic' is the wordplay.
'oddball' is an anagram indicator (I've seen this in other clues).
'heretic' anagrammed gives 'ETHERIC'.

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