Possible Clues:

• By the sound of it, consideration nailed down
• Appended, with 'on'
• In conversation, discretion is nailed
• Went about enunciating what diplomats require
• Changed one's position with pronounced diplomacy
• Zig-zagged (in a sailing boat); fixed
• Made fast change, of course, with diplomacy by the sound of it
• Fixed with diplomatic handling, reportedly
• Fastened, in a way
• Changed course due to careful handling, say