Atrocity, scandal (7)
I believe the answer is:
outrage
I believe this is a double definition.
'atrocity' is the first definition.
(I know that outrage is a type of atrocity)
'scandal' is the second definition.
(scandal can mean an occasion for public outrage)
(Other definitions for outrage that I've seen before include "Great anger" , "Appalled reaction" , "Incense and offend" , "Scandal" , "Fury" .)