Indignation (7)
'indignation' is the definition.
(I know that indignation can be written as outrage)
This is all the clue.
(Other definitions for outrage that I've seen before include "To argue about act that shocks public opinion" , "Shock horror!" , "Gross affront to decency" , "Appalled reaction" , "Very angry reaction" .)
(Other definitions for dudgeon that I've seen before include "feeling of resentment" , "Angry feeling" , "Umbrage" , "Devil's Disciple" , "Deep resentment" .)