Landed property in European nation (6)
I believe the answer is:
estate
'landed property' is the definition.
(I've seen this before)
'european nation' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'nation' becomes 'state' ('state' can be a synonym of 'nation'**).
'e'+'state'='ESTATE'
'in' is the link.
(Other definitions for estate that I've seen before include "Land with buildings" , "Rank - housing development - car" , "Area of landed property" , "All of one's assets -- 5-door car" , "House and grounds" .)