Pushing by hand would be dangerous, I would use a jointer if you have access to one. If not my second option would be to attach the stave to a carrier board that has a straight edge. Have the stave extend over the edge nearest the blade by the amount you want to cut off and have the other edge of the carrier board run against the fence on you table saw. you should be able to get a flat straight cut and still be safe.
Swimbill