Crossword clue: an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins

The most common answer is ufo (3 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

ufo 3 letters wn-def

an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins