Rich dessert (6)
I believe the answer is:
gateau
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rich dessert</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 gateau that I've seen before include "Richly decorated cake" , "Rich cream cake" , "rich food" , "Something French for 22?" , "Gooey cake" .)