Riverside property in a foreign country (6)
I believe the answer is:
poland
'foreign country' is the definition.
'Poland' can be an answer for 'country' (Poland is an example). I am not certain of the 'foreign' bit.
'riverside property' is the wordplay.
'riverside' becomes 'po' (I can't explain this - if you can you should believe this answer much more).
'property' becomes 'land' (kind of property).
'po'+'land'='POLAND'
'in a' is the link.
Can you help me to learn more?
(Other definitions for poland that I've seen before include "Wroclaw's country" , "EU member" , "Its capital is Warsaw" , "Old pan (anag)" , "in E" .)