The term 'Cymbal's Kin' is a crossword solution which can be filled in with the word 'GONG', which is a four letter word. A GONG is a percussion instrument that is similar to a cymbal, but is larger and has a deeper sound. It is usually made of metal or stone and is struck with a mallet to produce a loud ringing sound. Gongs have been used in many cultures for centuries, often as part of religious ceremonies or rituals.