Crossword Genius

Aliens, briefly (3)

Ross

I believe the answer is:

ets

'aliens briefly' is the definition.
(ET is short for extraterrestrial; 'briefly' suggests an abbreviation)

This is the entire clue.

(Another definition for ets that I've seen is " Who teach soldiers".)

I've seen this clue in the Universal, The Wall Street Journal and the LA Times.
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