Biblical tower site (5)
I believe the answer is:
babel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">biblical tower site</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 babel that I've seen before include "Unfinished tower" , "Biblical city with a tower" , "Confused din of voices" , "Biblical tower location" , "incoherent sounds" .)