Set up to the ball. Then move your trail hand down on the club shaft below the grip. So there is a space between your lead hand and your trail hand. You are now holding the club like a hockey stick. Then make a back swing. This will naturally make your wrists lever. Then swing back to the ball. To do that the handle has to swing in towards your body instead of out and away from you. Then rehinge the club on the follow through. You can do this and hit the ball at slow speeds. It gives you a great feel for how your arms and wrists work in the swing.