Uncommonly haughty (6)
I believe the answer is:
lordly
'haughty' is the definition.
(I know that haughty can be written as lordly)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for lordly that I've seen before include "Aristocratic" , "high-handed" , "Imperious" , "Noble, lavish" , "Majestic" .)