Sucrose, eg (5)
I believe the answer is:
sugar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sucrose eg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that saccharose is a type of disaccharide)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sugar that I've seen before include "Sucrose" , "Sweet white substance" , "Mild oath (granulated?)" , "Cane or beet product" , "Basic sweetener" .)