Sweden, on reflection: open country (5)
I believe the answer is:
syria
'country' is the definition.
(Syria is an example)
'sweden on reflection open' is the wordplay.
'sweden' becomes 's'.
'on reflection' shows that the letters should be reversed in order.
'open' becomes 'airy' (I've seen this before).
'airy' written backwards gives 'yria'.
's'+'yria'='SYRIA'
(Other definitions for syria that I've seen before include "Arab republic, independent since 1946" , "Middle East republic" , "Country south of Turkey" , "Antioch once its capital" , "Middle-Eastern country" .)