The term 'hidden loot' can be summarized as a STASH of items that is kept secret and out of sight. The crossword solution for this term is 'STASH', which is a noun meaning a hidden store of goods or money. This term is often used in the context of criminal activity, such as when a thief hides stolen items or when a pirate buries treasure. It can also be used more generally to refer to any collection of items that is kept hidden away.