Turn a tackle into possession. Stay on your feet so you can play immediately, take the first touch away from the attacker rather than upfield, and find a team-mate instead of clearing it. Winning the ball and giving it back is not a defensive success.
Mark a 24x16m channel with a mini goal at one end for the attacker and a gate of two cones at the other. An attacker starts with the ball and attacks the mini goal, a defender faces him, and a team-mate supports behind and to one side. The defender contains, waits for the ball to be knocked past, and wins it standing up. From that moment the repetition is only successful if the ball leaves through the gate under control, either carried or passed via the team-mate. A clearance, a kick out of play or a ball surrendered straight back all count as a failed repetition even if the tackle was perfect. Rotate all three roles every two repetitions.
Watch any youth match and count what happens in the second after a young defender wins the ball. Most of the time it goes straight back to the opposition, launched upfield or out of play, and the touchline applauds. The tackle gets the credit and the giveaway that followed goes unmentioned.
The governing-body guidance on introducing defending is unusually blunt about this. Coaches are told not to praise aimless clearances or kicks out of play, because what gets cheered is what gets repeated, and a child who is applauded for hoofing it learns that the job ends at the tackle.
It does not. Defending is what a team does while it waits to attack, so a regain that is immediately surrendered has achieved almost nothing. The scoreboard treats it as a turnover either way.
That is why this practice scores the outcome rather than the tackle. The defender can win the ball perfectly and still fail the repetition if the ball does not leave under control. It feels harsh for about two repetitions, and then players start looking up before they have even won it.
Staying on the feet is what makes the rest possible. A defender who wins it standing can play the next pass immediately, while one who slides has produced a loose ball that either team might reach. Sliding is occasionally necessary and usually a last resort.
The first touch is the other half. Taken away from the attacker it buys the moment needed to find a team-mate; taken blindly upfield it is a clearance wearing better clothes.
A useful thing to tell young defenders: the tackle is not the end of the job, it is the start of ours having the ball.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.