Conclude, stop (6)
I believe the answer is:
finish
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">conclude</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">stop</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for finish that I've seen before include "Put the final touches to" , "Culminate" , "End or terminus" , "Conclude, wind up" , "Patina" .)