Possible Clues:

• Instrument is compact one? No, after reflection
• Instrument to reconcile a particle
• A C-string, one on an instrument
• You can squeeze a tune out of it
• Musical folder?
• One on after current string instrument
• At first it sounds like a string, but it's not one the strings
• box-shaped musical instrument like melodeon
• It's bellows are musical when it comes to the squeeze
• Harmony on 10-note instrument