River in Europe (4)
I believe the answer is:
oder
'river in europe' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oder that I've seen before include "German banker" , "River that, with the Neisse, forms the German-Polish border" , "River forming northern part of the German-Polish border" , "Rode around the European river" , "river, one in central Europe" .)