River in Europe (4)
I believe the answer is:
oder
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">river in europe</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)