Gallows (6)
I believe the answer is:
gibbet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gallows</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gibbet that I've seen before include "structure that spells death" , "wooden structure" , "Where suspension took place" , "where Jack Ketch worked" , "Scaffold" .)