Car horn (6)
I believe the answer is:
hooter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">car horn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that car horn can be written as hooter)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hooter that I've seen before include "Uphill stone pusher (Gk. myth)" , "it smells" , "Factory siren" , "Car horn or slang nose" , "owl?" .)