American car (4)
I believe the answer is:
auto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">american car</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 auto that I've seen before include "American vehicle" , "Car (mostly US)" , "Drama" , "Prefix denoting by or of the same person or thing" , "Car (chiefly in US)" .)