Exaggerates the merits of (9)
I believe the answer is:
oversells
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">exaggerates the merits of</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 oversells that I've seen before include "Exaggerates the merits of" , "builds up without foundation" , "Hypes" .)