In a small bowl, combine the walnuts, sugar, cinnamon and cloves; set aside. Brush a 15x10x1-in. baking pan with some of the butter. Unroll 1 package phyllo dough; cut stack into a 10-1/2x9-in. rectangle. Repeat with remaining phyllo. Discard scraps., Line bottom of prepared pan with 2 sheets of phyllo dough (sheets will overlap slightly). Brush with butter. Repeat layers 14 times. (Keep dough covered with a damp towel until ready to use to prevent sheets from drying out.) , Spread with 2 cups walnut mixture. Top with 5 layers of phyllo dough, brushing with butter between each sheet. Spread with remaining walnut mixture. Top with 1 layer of phyllo dough; brush with butter. Repeat 14 times. Cut into 2-1/2-in. squares; cut each square in half diagonally. Brush remaining butter over top. Bake at 350° for 40-45 minutes or until golden brown., In a large saucepan, bring syrup ingredients to a boil. Reduce heat; simmer for 10 minutes. Strain and discard zest; cool to lukewarm. Pour syrup over warm baklava.