Sleeping car (5-3)
I believe the answer is:
wagon-lit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sleeping car</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wagon-lit that I've seen before include "sleeper" , "In-law got injured in sleeping car" , "Sleeping car on continental trains" , "Continental sleeping-car" .)