Luxury US automobile (8)
I believe the answer is:
cadillac
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">luxury us automobile</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cadillac that I've seen before include "Car maker" , "Make acid call to car company" , "Luxury US car" , "Luxury US automobile" , "Make an acid call for the US car" .)