French port that was the scene of the Noyades during the French Revolution (6)
I believe the answer is:
nantes
(Other definitions for nantes that I've seen before include "Site of historic drownings" , "City on the Loire, associated with 1598 edict ending the French Wars of Religion" , "City and port of W. France on the Loire" , "Port city in western France" , "in Pays de la Loire?" .)