Instruction - returning the club square at impact

Just found out why I was hooking and cutting the ball. My club head wasn't coming down square and was slightly open on the downswing. Thus had to do a quick flip to compensate, which results in a hook or opening the shoulder resulting in a cut.
How to know if the clubface is square? The grooves of the club should be pointing straight down as you approach from the three o clock position. Don't believe? Try it. You will notice if you held the lag and not break the wrist early. The club will return square.
pics not very good, but try to imagine the second photo shows how your club head should be at 3 o clock, and if you turn the hips and not release the club too early, it will get you to the first pix.