Shuts (6)
I believe the answer is:
closes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shuts</span>' is the definition.<br/ ><span class="explanation-format__explanation">('close' can be a synonym of 'shut')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for closes that I've seen before include "Wind up" , "comes to an end" , "Shuts" .)