Certificate; restriction (13)
I believe the answer is:
qualification
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">certificate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">restriction</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for qualification that I've seen before include "Diploma" , "evidence of capability?" , "Possibly a rider" , "Proviso" , "Relevant certificate" .)