Related Clues:

• Heart, e.g
• Ballpark staple
• Common church or arena instrument
• Calliope cousin
• Church instrument — heart, perhaps
• The skin is the largest one in humans
• Mass music maker
• Musical journal?
• A human's skin, e.g
• One type of keyboard ..
• It's often heard at a ballpark
• Kidney or liver
• 'The Phantom of the Opera' soundtrack instrument
• Tabernacle instrument
• Eye or skin