Dissolve the sugar in the water, bring to a boil in a sauce pan, then reduce to a simmer. Add the cinnamon stick. Cut the orange in half, squeeze the juice from both halves into the mixture. Push cloves into the orange halves (all over, about 1/2” apart) and put them in the mixture. Simmer 30 minutes.
Heat the wine in another (larger) sauce pan, to near boiling. Remove from heat. Throw out the orange halves, move the cinnamon stick to the wine sauce pan, and strain the mixture into the wine through a fine wire mesh.
Add 1 oz brandy to 8 oz mulled wine in an earthenware (or Irish coffee) mug.
Happiest of holidays to you all!