Excellent; superb (3-5)
I believe the answer is:
top-notch
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">excellent</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">superb</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for top-notch that I've seen before include "Superb" , "Excellent (informal)" , "Of the highest quality" , "Wonderful" , "First-rate" .)