The term FIXED A PIANO can be summarized by the crossword solution TUNED, which is a five-letter word. Tuning a piano is a process that involves adjusting the tension of the strings and other components to ensure that the instrument produces the correct pitch. This process is usually done by a professional technician who has experience in tuning pianos. The technician will use specialized tools to adjust the strings and other components until the desired pitch is achieved. By tuning a piano, the technician can ensure that the instrument produces the best possible sound.