Ivory, for one, is a type of hard, white material that is commonly used to make items such as piano keys, billiard balls, and sculptures. It is also used in the production of jewelry and other decorative items. The crossword solution for Ivory, for one, is SOAP, which is an acronym for Substantially Organic Animal Product. This term is used to describe ivory that has been harvested from animals such as elephants, walruses, and narwhals.