Rebuilt Roman residence? (5)
I believe the answer is:
manor
'residence?' is the definition.
(I know that manor is a type of mansion)
'rebuilt roman' is the wordplay.
'rebuilt' is an anagram indicator.
'roman' is an anagram of 'MANOR'.
(Other definitions for manor that I've seen before include "Country seat" , "Big house - police district" , "Land once belonging to a nobleman" , "house on estate" , "Mansion of a wealthy person" .)