Combine the elderberries, water, ginger, cinnamon sticks and cloves in a medium saucepan and place over medium-high heat. Bring to a boil and reduce heat to simmer. Continue simmering for 45 minutes or until the liquid has reduced by half. Remove from heat and let cool for 15 minutes. Add raw honey (to taste) and stir until dissolved. Strain the syrup into a quart sized mason jar and store in the refrigerator.