Fixing a Slice
Imagine that the ball is on a peg, and that all it can do is spin one way or another. To spin the ball clockwise, the club has to swing more to the left with the clubface pointing slightly to the right. In a golf shot, this is exactly what happens to make the ball curve across the sky as a slice.
This can often be confirmed by looking at the divot. On the course, the divot produced by a slice swing is often pointing well left with the ball ending up well right of the divot’s direction. This is a classic slice.