Possible Clues:

• Judicial killer
• One carrying out death sentence
• One's paid to polish off performance by Queen
• Person getting to top in his career
• One who carries out death sentences
• Topping official making you late for work
• Recount last of the vote that is cast for Monsieur de Paris
• Hangman
• I'm expected to make a killing, maybe by applying cuts in final sentence
• Ko-Ko was high as this lord!