Check this description of the hang power clean from cathletics.com
With a clean grip, lift the bar to the standing position. Lower the bar under control to the chosen hang position (most often mid-thigh, knee or right below the knee). Once reaching the hang position, initiate the power clean by pushing against the floor with the legs first. Drive the legs against the floor and extend the hips aggressively, keeping the bar in close proximity to the body and bringing it into contact with the hips as you reach complete extension. After extending, pick up and move your feet into your squat stance while pulling your elbows high and to the sides to move yourself down into a partial squat under the bar while keeping the bar and your body as close to each other as possible. Turn the elbows around the bar and into the clean rack position, and stop the squat with the thighs above horizontal. Stabilize and recover to a standing position with the bar overhead.
The purpose of the hang power clean can vary depending on its application. It can be an exercise to help teach beginners to clean that is often easier than lifting from the floor because of the abbreviated movement and the ability to ensure proper positioning and balance at the start of the second pull, and the power receiving position reduces the demand on mobility. As a training exercise, the common purpose is to develop better force production in the extension and more aggressiveness in the pull under due to the limited time and distance to accelerate and elevate the bar, and the limited movement down under the bar. Another purpose is use as a lighter clean variation for lighter training days (weights naturally limited for most lifters relative to the clean, and somewhat less work for the legs and back to allow more recovery for subsequent training sessions)—even more so for the power variation because the squat under is partial instead of full.
So to summarize. The hang power clean is awesome because it is easier to learn.
The hang power clean is awesome because it makes you more explosive.
The hang power clean is awesome because of the fact that it forces you to lift at lighter weights, yet lift nonetheless.
This fact makes you feel better after a workout like the one you had on Wednesday.
The hang power clean is awesome because there is no squat involved.
YOU ARE AWESOME. THE FACT THAT YOU AND THE HANG POWER CLEAN ARE AWESOME MEANS THAT IF YOU COME
TO THE GYM ON A DAY WHERE HANG POWER CLEANS ARE OCCURRING, THERE WILL BE AWESOMENESS HAPPENING
ON MULTIPLE DIFFERENT LEVELS. I WANT TO WITNESS THIS FIRST HAND. THEREFORE YOU ARE HEREBY COMPELLED
TO COME TO THE GYM TO ALLOW ME TO WITNESS THIS EVENT OF AWESOMENESS.
5 Rounds For Time
15 Hang Power Cleans (95#/65#)