Simple. Weight leaned into forward pivotal axis. Pop the tension out of your arms with a small heave. As the arms and club run out of momentum in the backswing, they are slung forward by a pivoting forward leg. The arms and club work on an arc, sending the ball on a tangent.
It’s exactly the same as a small chip, pitch, etc…. Centrifugal force keeps the arms and club in motion and on path.
*Yes, there is a small counterfall.