Possible Clues:

• The defending side in round four make progress
• The right quartet inside prosper
• Telegraph ends, right, with setter's flourish
• Dowelling, perhaps?
• Boom concealed in the Forth River
• H would do well to do this with a rivet
• Really do well
• Well, that's the way to do
• Do well with article about Irish king close to victory
• Few in their organisation do well