Possible Clues:

• Keep getting better
• Perk up one minute before show
• Better electoral system? I suggest accepting it
• This writer's needing to demonstrate progress
• Independent test after end of term must be better
• To make progress I instigate circling press release
• Perfect rogue on cruise
• This setter's virtually undoubted to get better!
• Island politician with range to make progress
• Pick up stray following mischief-maker