The crossword solution for the term 'Money in a Jar, Maybe' is TIP, which is an acronym for 'To Insure Promptness'. This phrase is commonly used in the hospitality industry to refer to the practice of leaving a gratuity or monetary TIP for service personnel such as waiters, bartenders, and cab drivers. It is also sometimes used to refer to the practice of leaving a small amount of money in a jar or other container as a donation.