Preheat oven to 350° F.
Score top of ham into diamonds and stud center of each diamond with a clove. On a rack in a roasting pan bake ham in middle of oven 1 1/2 hours.
In a bowl combine, mustard, brown sugar and maple syrup. Remove pan from oven. Spread mustard mixture over top and sides of ham. Return to oven and continue to bake until mustard coating is golden brown, about 35 minutes.
Transfer ham to a platter. Let sit for 15 minutes before serving. Serve with maple mustard sauce on the side.
Stir together mustard and syrup until combined well.
Note: Sauce can be made 2 days ahead and chilled, covered. Bring to room temperature before serving.Yield: 3/4 cup