Citrus Herb-Roasted Turkey & Port Gravy

WHAT YOU'LL NEED

• 1 orange, halved
• 2 tubs Knorr® Homestyle Stock - Chicken, divided
• 1/4 cup assorted fresh herbs (fresh thyme leaves, sage, parsley and/or rosemary)
• 2 Tbsp. olive oil
• 1/2 tsp. ground black pepper
• 2 medium sweet onion, quartered
• 1 11 lb. turkey, giblets and neck reserved
• 4 cups water
• 1 stalk celery
• 1 carrot, coarsely chopped
• 1 small onion, halved
• 2 Tbsp. all-purpose flour
• 2 Tbsp. heavy cream
• 1/4 cup port wine