Undertaker's vehicle (6)
I believe the answer is:
hearse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">undertaker's vehicle</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 hearse that I've seen before include "Funeral car" , "Carriage for a corpse" , "Vehicle for carrying the dead" , "Vehicle for conveying a coffin" , "Undertaker's car" .)