Vent; shop (6)
I believe the answer is:
outlet
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">vent</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that vent can be written as outlet)</span><br/ ><br/ >'<span class="explanation-format__original">shop</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(outlet can mean a shop or market)</span><br/ ><br/ ></span>
(Other definitions for outlet that I've seen before include "Maths relationship" , "Vent, means of escape" , "Way of release" , "Exit pipe" , "Store" .)