A one-woman opera (4)

I believe the answer is:

aida

'opera' is the definition.
(Aida is an example)

'a one-woman' is the wordplay.
'one woman' becomes 'ida' ().
'a'+'ida'='AIDA'

(Other definitions for aida that I've seen before include "Covent Garden production?" , "Egyptian opera by 11 Down" , "Verdi opera" , "eponymous heroine" , "she dies entombed" .)

I've seen this clue in the Evening Standard.

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