Very eager to tour a country (7)
I believe the answer is:
hungary
'country' is the definition.
(I know that Hungary is a European nation)
'very eager to tour a' is the wordplay.
'very eager' becomes 'hungry' (hungry can mean eager or enthusiastic).
'to tour' means one lot of letters goes inside another (to tour can mean to go around).
'hungry' enclosing 'a' is 'HUNGARY'.
(Other definitions for hungary that I've seen before include "One member of NATO" , "part of Europe" , "vizsla from here?" , "It's capital is Budapest" , "Liszt's land" .)