Incredibly remote shooting star (6)
I believe the answer is:
meteor
'shooting star' is the definition.
(I know that shooting star can be written as meteor)
'incredibly remote' is the wordplay.
'incredibly' indicates anagramming the letters.
'remote' with letters rearranged gives 'METEOR'.
(Other definitions for meteor that I've seen before include "It causes a streak of light in the night sky" , "Falling star" , "Remote type of heavenly body" , "Glowing heavenly body" , "Small piece of matter in the solar system" .)