Yorkshire river (3)
I believe the answer is:
ure
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">yorkshire river</span>' is the definition.<br/ ><span class="explanation-format__explanation">(River Ure)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ure that I've seen before include "Ripon's river" , "River at Ripon" , "Wensleydale river" , "North Yorkshire river" , "Midge --, singer" .)