Visitors from afar, in brief

ETS

Think of three-letter beings who might phone home from another world.

"Visitors from afar" hints at beings from outer space, often called extraterrestrials. The clue adds "in brief," which means we need a short or abbreviated form—so "extraterrestrials" gets trimmed to "ETs." It’s a straightforward abbreviation with a playful nod to sci-fi culture, where ETs are the classic shorthand for alien visitors.