Of the highest standing (3-6)
I believe the answer is:
top-drawer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of the highest standing</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 top-drawer that I've seen before include "Perfect" , "Of the highest standing" , "of high social standing" , "Excellent" .)