Possible Clues:

• Stringed instrument that may be taller than its player
• Keep on about
• Cheer up with piano that's traditionally played in Ireland
• PJ Harvey "Broken ___"
• Chordophone
• Lyre-like instrument of antiquity
• Many-stringed musical instrument
• Instrument capable of glissandi
• Nag
• Instrument that often sits on the floor while played