Track the run and clear it. Follow the runner all the way, stay goalside and touch-tight, and get across him to head the ball clear.
A ball is clipped toward a runner arriving in the box; the defender tracks the run and heads it clear. Emphasise following the runner all the way, staying goalside, and attacking the ball to clear it high and wide. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.