Reasoned exposition (9)
I believe the answer is:
rationale
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reasoned exposition</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 rationale that I've seen before include "grounds?" , "justification" , "Logic, reasoning" , "Reasoned exposition" , "Motivation" .)