Crossword Genius

Dynamic prefix (4)

Ross

I believe the answer is:

aero

'dynamic prefix' 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 meaning air or aircraft" , "bar" , "Prefix denoting air" .)

I've seen this clue in The Washington Post, the Newsday and The Wall Street Journal.
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