Promotional description (5)
I believe the answer is:
blurb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">promotional description</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 blurb that I've seen before include "Brief commendatory advertisement" , "A book's puff" , "Advertising text" , "Publisher's promotional description" , "Promotional statement on a book's dust jacket" .)