Forms (6)
I believe the answer is:
shapes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">forms</span>' is the definition.<br/ ><span class="explanation-format__explanation">('shape' can be a synonym of 'form')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for shapes that I've seen before include "Moulds in phases" , "Oblong and square, say" , "Triangle, globe etc" , "Forms, outlines" , "Casts or moulds" .)