Rich sweet cake (5)
I believe the answer is:
torte
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rich sweet cake</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 torte that I've seen before include "Sweet cake or tart" , "Rich (Austrian) cake or pastry" , "Sweet cake (from Ger.)" , "German cream cake" , "1d [PASTRY]" .)