Roman-style domicile (5)
I believe the answer is:
'domicile' is the definition.
(I know that manor is a type of farm)
'roman-style' is the wordplay.
'style' indicates an anagram (style can mean to shape or design).
'roman' anagrammed gives 'MANOR'.
(Other definitions for manor that I've seen before include "local copper's area" , "house on estate" , "Operational base" , "Landed estate" , "Country seat" .)