Became more profound (8)
I believe the answer is:
deepened
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">became more profound</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 deepened that I've seen before include "Became more profound" , "Made more profound" , "Made more intense" .)