Crossword Genius

Practises boxing (5)

Ross

I believe the answer is:

spars

(Other definitions for spars that I've seen before include "Boxes" , "disputes" .)

I've seen this clue in The Mirror and the Evening Standard.
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.