Six-sided shape (7)
I believe the answer is:
hexagon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">six-sided shape</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 hexagon that I've seen before include "Shape of a honeycomb cell" , "there are several sides to it" , "Six-sided shape" , "A six-sided geometric figure" , "Six-sided polygon" .)