River at Arles (5)
I believe the answer is:
rhone
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">river at arles</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 rhone that I've seen before include "12 wine region" , "River flowing through Lake Geneva" , "Current" , "Fr. river and wine" , "Major French river, rising in Switzerland" .)