Crossword Genius

Usual partner turning abnormal (12)

Ross

I believe the answer is:

supernatural

'abnormal' is the definition.
(thesaurus)

'usual partner turning' is the wordplay.
'turning' indicates anagramming the letters.
'usual'+'partner'='usualpartner'
'usualpartner' anagrammed gives 'SUPERNATURAL'.

(Other definitions for supernatural that I've seen before include "Mysterious" , "Not of this world" , "unknown to science" , "Magic" , "Magical; occult" .)

I've seen this clue in The Telegraph.
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