Tailed orbiter (5)
I believe the answer is:
comet
'tailed orbiter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for comet that I've seen before include "Plane" , "one of Santa's reindeer" , "Long distance traveller" , "high-flier" , "Heavenly body with a fiery tail" .)