Possible Clues:

• Sounds as if a Scotsman's cow gets stuck there
• In which the pitch might be investigated
• So caustic about properties of sound
• One of the Scotsman's cattle has got stuck in the mud, by the sound of them
• CIA scouts seeking properties of sound
• A Scotsman's cow gets stuck, and soundly so
• The study of sound
• 'How a Scotsman's cow gets stuck, by the sound of it (9)'
• Sound study of a revolution remains as reported
• Sound study