In the open air, exterior (7)
I believe the answer is:
outside
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">in the open air</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">exterior</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for outside that I've seen before include "Where smokers now often must go" , "having emerged from the tunnel?" , "Without" , "Not indoors" , "External surface" .)