Complete duration (4)
I believe the answer is:
span
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">complete duration</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for span that I've seen before include "Hand's width" , "Bridge made of pans" , "A bridge or measure of width" , "Ox team; bridge" , "The total spread" .)