Make better in quality (7)
I believe the answer is:
improve
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">make better in quality</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 improve that I've seen before include "Train" , "Ameliorate" , "Polish" , "Get or make better" , "reform" .)