Pretentious songs? (4)

I believe the answer is:

airs

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'songs?' is the definition.
(I've seen this in another clue)

I don't understand how the rest of the clue works.

(Other definitions for airs that I've seen before include "'Tunes, melodies (4)'" , "Ventilates, say grievances" , "Pretentiousness" , "songs" , "Voices" .)

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

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