Flat tire's need (3)

I believe the answer is:

air

'flat tire's need' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for air that I've seen before include "Light wind; song" , "strain" , "Broadcast; express" , "Broadcast j" , "Demeanour" .)

I've seen this clue in the Universal, the Family Time and The New York Times.

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