Originating in outer space (6)
I believe the answer is:
cosmic
'originating in outer space' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cosmic that I've seen before include "Originating in outer space" , "Of the universe, infinite" , "To do with the whole universe" , "Coming from outer space" , "Of the universe, immense" .)