Send the lead shoulder down and out on a 45
In the takeaway, the coach says to stretch the handle back without much conscious body movement. As the swing continues to the top, move the lead knee and lead shoulder down and out while the trail shoulder works up and around. Imagine a club across the shoulders and point the lead shoulder down and out on a 45 along the target line, about a foot in front of the ball when the ball is near the middle of the stance.
Channel: stayhandsy
Watch official source at 32:22