The term 'CRUNCH KIN' is a combination of two words, 'CRUNCH' and 'KIN'. The word 'CRUNCH' is defined as a loud, sharp sound made when something is crushed or broken. The word 'KIN' is defined as a group of people related by blood or marriage. Together, the term 'CRUNCH KIN' can be interpreted to mean a group of people related by a loud, sharp sound. The crossword solution for this term is 'SITUP', which is an exercise that involves lying on the back with the knees bent and then raising the upper body off the ground. This exercise is often used to strengthen the abdominal muscles, which are important for maintaining good posture and balance.