Sucrose (5)
I believe the answer is:
sugar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sucrose</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sugar that I've seen before include "e.g. Glucose" , "White crystalline sweetener" , "Sweet ingredient" , "flattery" , "Sweetening agent" .)