Pastoral setting for a vulgar type in operatic excerpt (7)

I believe the answer is:

arcadia

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'pastoral setting' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for arcadia that I've seen before include "Idealised country region" , "Idyllic country of song-loving shepards" , "Idealised rural region" , "Idealised rustic paradise" , "Tom Stoppard play" .)

I've seen this clue in The Irish Independent.

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