Cake decoration (5)
I believe the answer is:
icing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cake decoration</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for icing that I've seen before include "Sugar coating as cake decoration" , "Sugary topping" , "unwelcome on aircraft" , "Finishing cake" , "Sugar-coating" .)