Peel oranges. Section and cut each section into halves. Put into the mixing jar along with the bitter orange peel, cloves, corriander and cinnamon. Add sugar, vodka, and water. Shake vigorously until the sugar is dissolved. Leave to infuse for 5 weeks. Strain and leave to clear. Be patient because this takes longer than most liqueurs. When clear, decant off clear liqueur and bottle.