Convincing defeat (9)
I believe the answer is:
thrashing
(Other definitions for thrashing that I've seen before include "Hiding" , "punishment" , "A very heady defeat" , "beating" .)
I've seen this clue in The Mirror.
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.