Wash the cherries, drain well, cut in half and remove the pits.
Mix the cherry halves with water, sugar, orange juice and zest, cinnamon and cloves. Bring the mixture to a boil and simmer for about 1 hour, stirring occasionally. Then allow to cool.
Remove the cloves and cinnamon stick. Puree the cooled cherry spice stock. Pour into a large, sealable jar (or sealable bowl) with the grain schnapps and stir. Let this mixture steep in the dark for about 8 weeks.
After this period, strain the liqueur, bottle and store in a cool place.