Crossword Genius

Opening (4)

Ross

'opening' is the definition.
(I know that vent is a type of opening)

This is all the clue.

(Other definitions for vent that I've seen before include "Opening for air/gas" , "Opening for air" , "Discharge; give expression to" , "Opening releasing gas" , "Aperture to allow an escape" .)

I've seen this clue in The New York Times, the Sydney Morning Herald, the Evening Standard, the Penny Press, the Newsday, The Star Tribune, the LA Times, The Mirror, The Wall Street Journal, the Newsday.com and The Independent.
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