Glazed Smoked Ham

Name: Glazed Smoked Ham
Ingredients: 1 large onion, quartered, root end intact; 1 (5 to 7-pound) smoked ham (shank end); 3/4 cup apricot jelly; 1/4 cup water; 8 sprigs fresh thyme, stripped; 3 tablespoons yellow mustard; 4 tablespoons cider vinegar; 2 teaspoons molasses; 1/2 teaspoon Worcestershire sauce; 1/4 teaspoon ground allspice; Pinch ground cloves; 1 1/2 cups low-sodium chicken broth; 1 tablespoon unsalted butter; 1 tablespoon all-purpose flour; Kosher salt and freshly ground black pepper