Disorderly Roman territory (5)
I believe the answer is:
manor
'territory' is the definition.
The answer and definition can be both related to property as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'disorderly roman' is the wordplay.
'disorderly' indicates an anagram.
'roman' anagrammed gives 'MANOR'.
Can you help me to learn more?
(Other definitions for manor that I've seen before include "Lord's estate" , "Big house - police district" , "lord's home" , "Roman (anag.)" , "Nobleman's land" .)