Crossword Genius

Flight-related prefix (4)

Ross

I believe the answer is:

aero

'flight-related prefix' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for aero that I've seen before include "Prefix denoting air" , "bar" , "Prefix meaning air or aircraft" .)

I've seen this clue in The Washington Post, the Penny Press, the USA Today, The New York Times, the L.A. Times Daily, the Universal and the LA Times.
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