Cake decorator (4)
I believe the answer is:
icer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cake decorator</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 icer that I've seen before include "One adding decoration, perhaps" , "Cake decorator" .)