Related Clues:

• Musician's triad
• A minor, for one
• Basic harmonic structure at the end of 'Hey Jude'
• Combination of notes
• Looking back, rail system hides one in secret Chinese organisation
• What a speaker may strike
• Base for a jazz chord
• Part of a guitar riff
• Guitar music notation
• Marchand, Pelletier and Trudeau, e.g
• C-E-G chord, e.g
• Certain musical chord
• Common chord
• One involved in jazz society
• Ship-breaker?