The crossword solution for the term PITCH SIGN is CLEF. A CLEF is a musical symbol used to indicate the pitch of written notes. It is placed at the beginning of a staff to specify which notes should be played higher or lower. The most common clefs are the treble CLEF, bass CLEF, and alto CLEF. Each CLEF assigns a different range of pitches to the lines and spaces of the staff. The treble CLEF is used for higher pitched instruments such as the violin, while the bass CLEF is used for lower pitched instruments such as the cello. The alto CLEF is used for middle-range instruments such as the viola.