Open-air (8)
I believe the answer is:
alfresco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">open-air</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for alfresco that I've seen before include "Open-air" , "Outdoors, meal perhaps" , "Located outdoors" , "Out of doors" , "exposed to the fresh air" .)