Section of a circle (3)
I believe the answer is:
arc
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">section of a circle</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for arc that I've seen before include "less than the complete circuit" , "Bend" , "circle? Not entirely" , "Turn" , "Part of a circle's circumference" .)