UFO pilots (3)
(Another definition for ets that I've seen is " Who teach soldiers".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ufo pilots</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)