Crossword Genius

Flight prefix (4)

Ross

I believe the answer is:

aero

'flight 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 Wall Street Journal, The Washington Post, the L.A. Times Daily and the King Feature Syndicate.
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