Subtle point or refinement (6)
I believe the answer is:
nicety
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">subtle point</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">refinement</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for nicety that I've seen before include "Fine distinction" , "Fastidiousness" , "Matter of delicate adjustment" , "shade?" , "Subtle point of distinction" .)