In-law got disorientated in sleeping car (5-3)
I believe the answer is:
wagon-lit
'sleeping car' is the definition.
(I've seen this before)
'in-law got disorientated' is the wordplay.
'disorientated' indicates anagramming the letters.
'in'+'law'+'got'='inlawgot'
'inlawgot' with letters rearranged gives 'WAGON-LIT'.
'in' acts as a link.
(Other definitions for wagon-lit that I've seen before include "Continental sleeping-car" , "Sleeping car on continental trains" , "In-law got injured in sleeping car" , "sleeper" .)