The term 'READY TO PLAY' can be broken down into two crossword solutions: 'TUNED' (5 letters) and 'WARMEDUP' (8 letters). 'TUNED' is a term used to describe an instrument that has been adjusted to the correct pitch. This is usually done by tightening or loosening the strings of the instrument. 'WARMEDUP' is a term used to describe an athlete or musician who has gone through a period of physical or mental preparation before engaging in a performance. This could include stretching, running, or playing scales on an instrument. Both terms are used to describe someone or something that is prepared to engage in a performance.