Possible Clues:

• Study sound with eg mouth instrument
• Harmonium
• Old gardener playing keyboard
• Going to play, regard one small instrument
• Study sound periodical that supports traditional services
• On horse rode back for a musical instrument
• Instrument does upset stomach, say
• Instrument went backwards, snatched by evil sister
• Scan reported above liver, say -- notes come from it?
• Wind instrument, such as the harmonium, accordion, or harmonica