Tots up (4)
I believe the answer is:
adds
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tots up</span>' is the definition.<br/ ><span class="explanation-format__explanation">('add' can be a synonym of 'tot up')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for adds that I've seen before include "Puts (numbers) together" , "Aggregates or makes further remark" , "Aggregates or appends" , "Goes on to say" , "Calculates the sum" .)