The golf swing is merely a chain link of reactions to a motion that already happened. 

Just let that resonate a little bit, because it’s truly the best thing I ever learned about the golf swing!  Ok!  On to the topic of hand which is the body hang back you see so often of all slicers…

As I just primed you for, the body hang back isn’t the motion you need to fix first.  It is a reaction to the club face being so far open and out of position that the hang back is the only way to get the face close to square at impact.  If you were to try to fix the hang back before the club face, you would hit the ball 80 yards right because you’ve already got a club face that’s wide open and moving the body further towards the target will leave the face pointing well right.

The first place to look on slicers is the club face position at the top and in the wrist angles during transition.   One thing to clarify first…  If the leading edge of the club and your left forearm are parallel, the face is square.  If the face is pointed at the sky, it’s closed and if it’s pointed towards your head, it’s wide open.  This last one is the killer for the slicers!  A little strengthening of the left hand grip can help this out drastically however, what happens with the wrist angles in transition can kill even the best intentions.

We must strengthen/close the club face as we begin the downswing.
This will be achieved with a wrist motion that will mimic Dustin Johnson’s position at the top of his swing with the left wrist bowing.  Now DJ starts the top position with that bowed wrist, but we’re going to focus on increasing that bowing as the start to our downswing.  As opposed to the slicer’s first move which is to unhinge the wrists and often increase cupping of the left wrist!