Animals in European countries (6)
I believe the answer is:
elands
'animals' is the definition.
(I've seen this before)
'european countries' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'countries' becomes 'lands' ('land' can be a synonym of 'country').
'e'+'lands'='ELANDS'
'in' acts as a link.
(Other definitions for elands that I've seen before include "African antelopes with twisted horns" , "Large African antelopes" , "Animals" .)