One leaving Italian region, say, reflected resentment (7)
I believe the answer is:
umbrage
'resentment' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for umbrage that I've seen before include "In high dudgeon" , "Suspicion of injury" , "Take this to show offence" , "Offence, annoyance" , "Feeling of offence" .)