Tuck the right elbow to a rib to keep your wrist hinge
At address, Craig Hanson has you tuck the trail (right) elbow into your side against a rib, then keep feeling like you are still touching that same rib as you swing back. He warns that if the right arm gets long and disconnects, you lose the wrist break (the wrist hinge). Keeping the elbow tucked and connected preserves that hinge.
Channel: CraigHansonGolf
Watch official source at 2:51