Scandinavian mainly going after Massachusetts properties (6)
I believe the answer is:
manors
'properties' is the definition.
(manor is a kind of property)
'scandinavian mainly going after massachusetts' is the wordplay.
'scandinavian' becomes 'norse' (Norse can mean relating to ancient Scandinavia).
'mainly' means to remove the last letter.
'going after' is a charade indicator (letters next to each other).
'massachusetts' becomes 'ma'.
'norse' with its last letter taken off is 'nors'.
'nors' after 'ma' is 'MANORS'.
(Another definition for manors that I've seen is " Large country houses with land".)