Rich tart (10)
I believe the answer is:
cheesecake
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rich tart</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 cheesecake that I've seen before include "Provocative girls" , "Rich sweet tart" , "Creamy tart" , "Sexy female photographs - rich sweet" , "Dessert food" .)