Related Clues:

• Source of a Marxian nickname
• Deceptive-sounding instrument?
• Angelic musicmaker
• Heavenly musical instrument?
• It can be played in early retirement
• Apollo plucked it
• Harp kin
• Harp of yore
• Cheer up with piano that's traditionally played in Ireland
• Turtle-shell instrument
• Lyre relative
• Ancient harp-like instrument
• Dream sequence signaler, maybe
• Harp's old cousin
• Depiction on Irish euros