Mould, sculpt (5)
I believe the answer is:
shape
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">mould</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that cast is a kind of shape)</span><br/ ><br/ >'<span class="explanation-format__original">sculpt</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that sculpt is a kind of shape)</span><br/ ><br/ ></span>
(Other definitions for shape that I've seen before include "Phase (anag.)" , "External form" , "Good physical form" , "Mould into new phase" , "Heaps (anag.)" .)