An air of sanctity (5)

I believe the answer is:

motet

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'an air of sanctity' is the definition.
The definition suggests a singular noun which matches the answer.

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(Other definitions for motet that I've seen before include "Religious choral composition" , "10 [COMPOSITION]" , "Something to sing" , "Short sacred vocal work" , "Creating sacred piece" .)

I've seen this clue in The Globe and Mail.

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