Many players release incorrectly because they can not physically produce the internal rotation of the hip needed in the downswing and release, use this quick half minute stretch before playing to work on your hip flexibility and allow your body to make the proper swing
An inside out swing approaches the ball on the downswing from too low, hitting the half of the ball closer to the player, causing a push or hook which requires the player to work on getting the club further up and out on the downswing
We are looking to create a clubhead that is traveling down to hit the ball, so take your address position and straighten out your left knee, this will bring your hip back, move the shaft forward and straighten your left wrist