In a 4- to 6-quart Dutch oven, combine cider, lemon juice, and sugar. Bring to boiling, stirring to dissolve sugar. For spice bag, place cinnamon and cloves in center of a double-thick, 6-inch square of 100-percent-cotton cheesecloth. Tie closed with a clean string. Add spice bag and 3 sliced oranges to the cider mixture.