Deduct (8)
I believe the answer is:
subtract
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deduct</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that deduct can be written as subtract)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for subtract that I've seen before include "Take an amount away" , "Withdraw" , "dock" , "Take one quantity away from another" , "Knock off" .)