Place ham on a rack in a roasting pan. Score the surface with shallow diagonal cuts, making diamond shapes; insert whole cloves into diamonds. Secure pineapple slices and cherries on ham with toothpicks. In a small bowl, combine the brown sugar, peach nectar,vinegar and ground cloves. Spoon half of glaze over ham.
Cover and bake at 350 degrees for 2 hours. Uncover; bake 20-30 minutes longer or until a meat thermometer reads 140 degrees basting twice with remaining glaze