Perfect neatness (5-3,5)
I believe the answer is:
apple-pie order
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perfect neatness</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 apple-pie order that I've seen before include "Perfectly tidy" , "Perfect state of neatness" , "Everything precisely in its place" , "Excellent shape" , "Perfect arrangement" .)