[O.B.Left]

The right hip must be turned back prior to the right elbow passing on the backswing.

On the downswing the right hip must be held in its back position until the right elbow passes it.

Otherwise you are most likely "roundhousing". Try the search function for more info.

For me clearing the right hip is the first thing I do in the backswing and the perhaps the single most important change I have made in my action since I started getting lessons from Yoda (although there a quite a few of em.)