The term 'SECRET STORAGE SPOT' can be summarized by the crossword solution 'CACHE', which is a five-letter word. A CACHE is a hidden storage spot, usually used to store items that are meant to remain hidden or secret. It is often used to store food, weapons, or other supplies in order to keep them safe and secure. Caches are also used to store data and information, such as passwords, encryption keys, and other sensitive information.