The crossword solution for the term 'Bass or Baritone' 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 indicate the pitch of the notes written on that line. The two most common clefs are the treble CLEF, which is used for higher pitched instruments such as the violin, and the bass CLEF, which is used for lower pitched instruments such as the bass or baritone.