(Of change) very rapid (8)

I believe the answer is:

meteoric

(Other definitions for meteoric that I've seen before include "moving at high speed" , "Dazzling, transient" , "Remarkably quick" , "with brilliant speed" , "flashing!" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.