Crossword Genius

Prefix in aviation (4)

Ross

I believe the answer is:

aero

'prefix in aviation' is the definition.
(I've seen this in another clue)

This is all the 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 New York Times, the Universal, the Newsday and the Newsday.com.
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