Like a shooting star (8)
I believe the answer is:
meteoric
'like a shooting star' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for meteoric that I've seen before include "Spectacularly fast" , "Erotic me being suddenly brilliant" , "Brilliant, as a shooting star" , "Dazzling and rapid, rise say" , "(Of change) very rapid" .)