Permit, stub (6)
I believe the answer is:
ticket
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">permit</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">stub</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for ticket that I've seen before include "Permit, coupon" , "Voucher, pass" , "'Just the ------': an appropriate thing" , "lottery entry" , "Travel warrant" .)