Oval shape (7)
I believe the answer is:
ellipse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oval shape</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ellipse that I've seen before include "See pill (anag) - oval" , "Shape - sell pie (anag)" , "Inclined plane through a cone" , "Geometrical oval" , "Egg-shaped geometrical figure" .)