Prepare for a prizefight (4)

I believe the answer is:

spar

(Other definitions for spar that I've seen before include "Crystalline mineral" , "Box; mineral; pole" , "Box (lightly) - fight (verbally)" , "What boxers do" , "Translucent mineral" .)

I've seen this clue in The Wall Street Journal.

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.