Luxury railway carriage (7)
I believe the answer is:
pullman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">luxury railway carriage</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 pullman that I've seen before include "luxury car" , "Luxury railway carriage" , "Philip --, novelist" , "Luxurious style of railway carriage" .)