Make intelligible (7)
I believe the answer is:
explain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">make intelligible</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for explain that I've seen before include "Pin axle (anag.)" , "area affected by mountain formation?" , "Elucidate, clarify" , "Interpret" , "Make understandable" .)