Related Clues:

• It may be struck
• Feeling
• Guitar sound
• C-E-G, e.g.
• Musical combo?
• Group of pitches
• Orchestral work
• It can't be played on a trumpet, e.g.
• Emotion, when 'struck'
• A musician may strike it
• Musical triad
• It can't be played on a clarinet
• Group of musical notes
• Music combo?
• Ninth, e.g.