Sum, aggregate (5)
I believe the answer is:
total
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">sum</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that sum can be written as total)</span><br/ ><br/ >'<span class="explanation-format__original">aggregate</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that aggregate can be written as total)</span><br/ ><br/ ></span>
(Other definitions for total that I've seen before include "given by 8 [ADDING MACHINES]" , "energy provider" , "Completely destroy" , "Whole amount" , "Entirety" .)