The term 'READY TO BE PLAYED' can be summarized by two crossword solutions: CUED (4 letters) and TUNED (5 letters). CUED means to give a signal or prompt, while TUNED means to adjust something so that it is in harmony with something else. In the context of music, these terms refer to the preparation of an instrument before playing it. CUED could refer to the act of setting up the instrument, such as tuning the strings, while TUNED could refer to the act of adjusting the instrument to the desired sound.