Hi

Your problem is a slice that is caused by an out to in swing path, most golfers have this problem. Yours is caused by you coming over the top at the start of your downswing, this puts the clubface outside the swingpath and on a steep approach angle (your shots probably fly high to the right).

You have to focus on keeping the club approaching the ball from the inside on a shallower plane. Currently you start your downswing by rotating your shoulders thus pulling the club over the top forcing you to cut across the ball at impact. Start your downswing by turning your hips while dropping your arms straight down so that your right elbow comes into your right hip, keep your wrists at the same angle as they were at the top of the backswing. Now you can release your forearms, wrists and shoulders through the ball on the inside path.

Hope this helps
Brian