Turn inwards (9)
I believe the answer is:
introvert
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">turn inwards</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 introvert that I've seen before include "Self-absorbed person" , "one's reserved" , "eschewing external contact" , "Turn inwards" , "Shy type" .)