Airport parking area (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">airport parking area</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for apron that I've seen before include "Airport area for manoeuvring and loading planes" , "Protective garment (with strings attached!)" , "Pinafore" , "Cook's garment" , "Cook's protector" .)