Curving trajectory (3)
I believe the answer is:
arc
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">curving trajectory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for arc that I've seen before include "Car (anag.)" , "Curved part of circle" , "Part of a curve" , "part of turning circle?" , "Part of a circle's circumference" .)