Educational certificate (7)
I believe the answer is:
diploma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">educational certificate</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 diploma that I've seen before include "official document" , "Honorific document" , "Certificate of proficiency" , "Academic award" , "Certificate of education" .)