Possible Clues:

• Support leads to 50% of vote - well done!
• 'I'm very impressed!'
• "Well played!"
• A cry of well done
• Statement of approval head of BBC communicated on radio
• Applause accompanier
• "Great performance!"
• Thug, hired assassin; B (in radio communication)
• Well done; B (radio)
• Charlie's predecessor hired killer