Put up piece for executioner (7)
I believe the answer is:
hangman
'for executioner' is the definition.
(hangman is a kind of executioner)
'put up piece' is the wordplay.
'put up' becomes 'hang' (I've seen this in another clue).
'piece' becomes 'man' (man can mean a chess piece).
'hang'+'man'='HANGMAN'
(Other definitions for hangman that I've seen before include "Official executioner" , "Word-guessing game - executioner" , "official suspending offenders" , "Killer" , "Pencil-and-paper game for two" .)