In the midst of (5)
I believe the answer is:
among
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in the midst of</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 among that I've seen before include "Amidst" , "Go man! (anag.)" , "Amid" , "Together with" , "when in company" .)