The crossword solution for the term 'GOOD THING TO BREAK' is PAR, which stands for 'PARITY'. PARITY is a term used in mathematics and computer science to describe the equality of two numbers or values. It is often used to refer to the evenness of a number, such as when a number is divisible by two without a remainder. Breaking PARITY can be a good thing in certain situations, such as when a computer system needs to be updated or when a mathematical equation needs to be solved.