A bison wandering in country (6)
I believe the answer is:
bosnia
'country' is the definition.
(I know that Bosnia is a European country)
'a bison wandering' is the wordplay.
'wandering' is an anagram indicator.
'a'+'bison'='abison'
'abison' anagrammed gives 'BOSNIA'.
'in' acts as a link.
(Other definitions for bosnia that I've seen before include "Balkan region joined with Herzegovina" , "Part of former Yugoslavia" , "Balkan state" , "Balkan country" , "Central European country" .)