Underflow (anag.) (9)

I believe the answer is:

wonderful

(Other definitions for wonderful that I've seen before include "Remarkably good" , "Fantastic, terrific" , "Marvellous" , "Great" , "Excellent" .)

I've seen this clue in The Telegraph.

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.