Possible Clues:

• Changed a yacht's course
• That was just for a change, of course, and got it nailed
• Nailed by diplomatic report
• Turned into the wind
• Turned into and through the wind, as sailors do
• Made fast with a change of course
• Changed the course of diplomacy, by the sound of it
• Changed, of course, with the sound of diplomacy (6)
• Sailed and nailed with diplomacy, by the sound of it
• Stitched using sound diplomacy