Subtle distinction or precision (6)
I believe the answer is:
nicety
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">subtle distinction</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">precision</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">or</span>' acts as a link.<br/ ></span>
(Other definitions for nicety that I've seen before include "Fine distinction" , "Subtle point of distinction" , "Judge to a . . . . . . - with precision" , "Degree of precision" , "Small detail" .)