Musical work penned by bishop, erased (5)

I believe the answer is:

opera

'musical work' is the definition.
(operas are musical works)

'penned by bishop erased' is the wordplay.
'penned by' indicates a hidden word.
'OPERA' is hidden in the letters of 'bishop erased'.

(Other definitions for opera that I've seen before include "some theatrics" , "Staged event" , "Carmen, for instance" , "Musical works" , "Macbeth, perhaps" .)

I've seen this clue in The Times.

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