Dump cider, cinnamon sticks and a couple of teaspoons of nutmeg into a pot over very low heat.
Slice oranges (after washing them well!!), and stick whole cloves into the rind, then float in cider as it warms.
Drink when it gets warm.
You can dump more cider into it up to a point when the spices get old - then just start again with a new set of spices, and a new orange.