Crossword Genius

Bubble filler (3)

Ross

I believe the answer is:

air

'bubble filler' 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 "Ventilate or give expression to" , "Ventilate, say grievance" , "- brick; - bed; - brush" , "strain" , "14" .)

I've seen this clue in the L.A. Times Daily, the Family Time and the LA Times.
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