Heat oven to 350°F. Place ham in shallow roasting pan in oven. Meanwhile, stir 2 T. apple cider and cornstarch together in a small bowl. In small saucepan, bring cornstarch mixture, remaining apple cider, mustard and cloves to a boil, stirring until thickened. Pour glaze over ham in oven and baste ham occasionally with this mixture until ham is heated through, about 45 minutes to an hour.