The power comes from your legs and hips, not your arms. The bar starts on the ground. As it passes your knees, you explosively extend your hips and knees, rising onto your toes. Your elbows flip high and forward. You dip under the bar into a quarter squat or shallow squat, catching it across your shoulders with your chest upright and core braced. Your elbows are high, never low. Stand up from the catch. The dip is where the lift happens; without it, you are pulling the bar, not cleaning it. Finish strong.