Crossword Genius

ET transports (4)

Ross

I believe the answer is:

ufos

(Other definitions for ufos that I've seen before include "Initially and formally, flying saucers" , "Mysterious things" , "Unauthorised traffic from outer space?" , "Potential alien craft" , "Mysterious objects in sky" .)

I've seen this clue in the Newsday and the Universal.
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