Haughtily, arrogantly (7)
I believe the answer is:
proudly
I believe this clue is a double definition.
'haughtily' is the first definition.
(I've seen this before)
'arrogantly' is the second definition.
(thesaurus)
(Other definitions for proudly that I've seen before include "With haughtiness" , "With feelings of self-respect and self-worth" , "Haughtily" , "With high self-regard" .)