Part of a wedding cake (4)
I believe the answer is:
tier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of a wedding cake</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tier that I've seen before include "he hasn't won?" , "One making knot - level" , "Hierarchical level" , "Rank - row" , "Storey" .)