In a saucepan, over medium heat, squeeze the orange halves into the saucepan, add the squeezed oranges and the sugar. Bring to a boil, reduce the heat to low and simmer for 5 minutes. Remove from the heat and cool completely. Strain into a 1 1/2-quart jar, pressing the oranges with the back of a spoon to release all of the juice. Stir in the wine. Stick the cloves into the whole oranges. Cut the oranges in half and add to the jar. Secure the lid tightly and allow to sit for at least 24 hours and up to 1 month.
To serve: strain over ice into a cordial glass.