UFO pilots (6)

I think it could be either:

Which length description are you looking for?:

aliens

'ufo pilots' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for aliens that I've seen before include "Immigrants" , "Outer space creatures, perhaps from Mars?" , "'Little green men'?" , "Creatures from another planet" , "Foreigners or extraterrestrials" .)

I've seen this clue in The Star Tribune.

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