In a large bowl, cream butter and sugar until light and fluffy. Beat in egg and molasses. Combine the flour, ginger, baking soda, cinnamon, cloves and salt; gradually add to the creamed mixture and mix well. , Roll into 1-1/2-in. balls, then roll in sugar. Place 2 in. apart on ungreased baking sheets. Bake at 350° until puffy and lightly browned, 10-12 minutes. Remove to wire racks to cool.