Crescent-shaped figure
I believe the answer is:
lune
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">crescent-shaped figure</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 lune that I've seen before include "English river" , "River in Lancaster" .)