Crossword Genius

Area 51 sighting, maybe (3)

Ross

I believe the answer is:

ufo

(Other definitions for ufo that I've seen before include "Saucer in the sky?" , "Initially and formally, flying saucer" , "Odd space object" , "Supposed alien craft" , "Airborne enigma" .)

I've seen this clue in the Universal.
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