Intelligible (5)
I believe the answer is:
lucid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">intelligible</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 lucid that I've seen before include "Easily understood; sane" , "Transparently clear" , "Clearly expressed and altogether rational" , "Clearly presented and easily understood" , "Clearly expressed; sane" .)