Crossword Genius

Operatic heroine alone, or otherwise (7)

Ross

I believe the answer is:

leonora

'operatic heroine' is the definition.
(from Fidelio)

'alone or otherwise' is the wordplay.
'otherwise' indicates anagramming the letters.
'alone'+'or'='aloneor'
'aloneor' is an anagram of 'LEONORA'.

(Other definitions for leonora that I've seen before include "Girl's name; or alone (anag.)" , "Girl" , "Name of woman" , "Heroine of Beethoven's Fidelio" .)

I've seen this clue in The Guardian.
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