Deducts from (5)
I believe the answer is:
docks
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deducts from</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for docks that I've seen before include "Removes tail" , "Enclosures where defendants sit" , "Cuts short; port features" , "main cargo area" , "Harbour" .)