Equiangular shape (6)
I believe the answer is:
isogon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">equiangular shape</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 isogon that I've seen before include "Equilateral triangle, say" , "See plane figure" , "Equiangular polygon" , "Regular figure" .)