Today, most of Turkey is upset with Romania (4,5)
I believe the answer is:
asia minor
'today most of turkey' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'is upset with romania' is the wordplay.
'upset with' indicates anagramming the letters.
'is' with its letters mixed up with 'romania' gives 'ASIA MINOR'.
Can you help me to learn more?
(Other definitions for asia minor that I've seen before include "Historical land" , "several?" , "Historical name for Anatolia" , "part of Turkey" , "was visited by early missionary" .)