Preheat oven to 325 degrees. In a large bowl, combine pecans, flour, salt, cinnamon, nutmeg, and cloves. In a separate bowl, combine butter and sugar, beat until creamy. Add flour mixture and vanilla, mixing until combined. Using a tablespoon , scoop out dough and roll into 1-inch balls.
Place on ungreased baking sheets, and bake for 20 minutes, or until lightly browned. Let cool on baking sheets for 3 minutes. Remove to wire rack to cool completely. Roll in powdered sugar . Makes 5 dozen.