Cassava product (7)
I believe the answer is:
tapioca
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cassava product</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tapioca that I've seen before include "Cassava product used for puddings" , "Pudding made from an extract of cassava" , "it thickens" , "Starchy pudding" , "Foodstuff used as a thickener" .)