The term 'SIGNALS TO START' can be broken down into two crossword solutions: Cues (4 letters) and Cuesin (6 letters). Cues refer to any type of action or sound that is used to indicate the beginning of an event. Cuesin is a variation of the word 'cuesing, ' which is the act of providing cues to start an event. Both words are commonly used in the context of sports, theater, and other activities that require a signal to begin.