The term CURING STUFF can be summarized by the crossword solution of SALT. SALT is a mineral composed primarily of sodium chloride, a chemical compound belonging to the larger class of salts. It is essential for human and animal health, and is used in many different ways, including as a preservative and flavoring agent. SALT has been used for centuries to cure meats, fish, and other foods, and is still used today in the curing process.