Preheat the oven to 350 degrees F. Lightly grease a 9x5 inch loaf pan (I use baking spray).In a medium bowl, whisk together the flour, sugar, baking powder, salt, cinnamon, allspice, nutmeg and cloves.Pour the beer into the dry ingredients and stir until just combined. Transfer the dough into the prepared loaf pan. Drizzle the melted butter over the top of the batter and bake until golden brown on top, approximately 50 minutes.Allow to cool on a cooling rack for 15 minutes before slicing.