Place shredded zucchini on a clean towel; roll up and squeeze to remove excess liquid. Set aside. In a large bowl, cream butter and sugar until light and fluffy, 5-7 minutes. Add the eggs, 1 at a time, beating well after each addition. Combine the flour, baking soda, cinnamon, salt, nutmeg and cloves; gradually add to the creamed mixture and mix well. Stir in the zucchini, nuts and chocolate chips.
Drop by tablespoonfuls 3 in. apart onto ungreased baking sheets. Bake at 375° until lightly browned, 10-12 minutes. Remove to wire racks to cool.