Preheat the oven to 350 degrees F. Butter a 9-inch round cake pan.
Separate the biscuit dough into 8 biscuits. Place 1 biscuit in the center of the pan. Cut the remaining biscuits in half, forming 14 half-circles. Arrange the pieces around the center biscuit with cut sides facing in the same direction. Brush melted butter over the tops of the biscuits.
In a small bowl, combine the walnuts, granulated sugar, and orange zest. Mix well and sprinkle over biscuits. Bake for 20 minutes or until golden brown.
Meanwhile, in a small bowl combine confectioners' sugar, cream cheese, and orange juice. Blend until smooth adding more orange juice, if needed, to thin. Drizzle glaze over the warm coffee cake and serve.