Cut the orange in half, and squeeze the juice into slow cooker. Push the cloves into the outside of the orange peel (or use a mesh tea ball), and add peel to the liquid. Pour in the bottle of Korbel Rose and heat on high for 2-3 hours.
Before serving, remove the clove-orange halves. Ladle into mugs or glasses that have been warmed up (rinse in warm water) to prevent breakage.