Site of public hangings? (6)
I believe the answer is:
museum
'site of public hangings?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for museum that I've seen before include "Place to keep and exhibit objects of interest" , "Repository for objects of historical interest" , "Building in which historical or scientific items are exhibited" , "The Hermitage" , "Building for historical artefacts" .)