Auto option (7)
I believe the answer is:
spoiler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">auto option</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 spoiler that I've seen before include "Aircraft flap for slowing" , "Aerofoil on a fast car" , "One who has wrecked" , "Flap putting brake on" , "giveaway" .)