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'm not certain of the 'foreign' bit.
'riverside property' is the wordplay.
'riverside' becomes 'po' (I can't explain this - if you can you should give a lot more credence to this answer).
'property' becomes 'land' (kind of property).
'po'+'land'='POLAND'
'in a' acts as a 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" .)