TIDY SUM is a term used to describe a sum of money that is organized and well-kept. The crossword solutions for this term are POT (3 letters), PILE (4 letters), WAD (3 letters), and PRETTYPENNY (11 letters). POT refers to a container, usually made of metal or ceramic, used for storing items. PILE is a large amount of something, usually arranged in a heap or stack. WAD is a small bundle of something, such as paper or cloth, held together by pressure. PRETTYPENNY is an informal term for a coin, usually a penny, that is considered attractive due to its condition or design.