Public executioner (7)
I believe the answer is:
hangman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">public executioner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(hangman is a kind of public executioner)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hangman that I've seen before include "Word game - executioner" , "Public executioner like Jack Ketch" , "Killer" , "wordgame?" , "Word-guessing game - executioner" .)