Place ham on rack in a shallow roasting pan. Bake, uncovered, in a 325 degree F. oven for 1 1/4 hours or until meat thermometer registers 140 degrees F. (about 15-18 minutes per pound.)
For the glaze, in a small saucepan combine brown sugar, cornstarch, nutmeg and cloves. Stir in apricot nectar and lemon juice. Cook over medium heat until thickened and bubbly, stirring constantly.
Brush ham with glaze. Continue baking 15-20 minutes more, brushing occasionally with glaze.