Second mentioned of two (6)
I believe the answer is:
latter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">second mentioned of two</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 latter that I've seen before include "The one just mentioned" , "Second-mentioned; recent" , "Second mentioned of two" , "Concluding" , "second one" .)