The outside (8)
I believe the answer is:
exterior
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the outside</span>' is the definition.<br/ ><span class="explanation-format__explanation">('exterior' can be a synonym of 'outside')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for exterior that I've seen before include "Outside" , "covering" , "Retire ox (anag)" , "Foreign" , "Outdoor" .)