Completion (3)
I believe the answer is:
end
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">completion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for end that I've seen before include "Goal; destruction" , "Time to break-up (3,2,4) - See 12" , "'Finish, cease (3)'" , "scrap" , "Objective or conclusion" .)