Expound (3,5)
I believe the answer is:
set forth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">expound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(setting forth is a kind of expounding)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for set forth that I've seen before include "Embark" , "Start out on journey - express" , "Proclaim" , "Begin journey or lay out" , "Depart" .)