Hale-Bopp, for one (5)
I believe the answer is:
comet
'hale-bopp for one' 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 "Celestial object" , "Halley's phenomenon in space" , "potential space invader" , "Dancer's colleague" , "Frozen body" .)