Song such as Nessun Dorma (4)

I believe the answer is:

aria

'song such as nessun dorma' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for aria that I've seen before include "Operatic song" , "Operatic air" , "Nessun Dorma, for example" , "complex song" , "Refrain" .)

I've seen this clue in The Guardian.

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