Female companion and drunk carrying on in sleeper (5-3)
I believe the answer is:
wagon-lit
'on in sleeper' is the definition.
'wagon lit' can be an answer for 'sleeper' (I've seen this before). I'm unsure of the 'on in' bit.
'female companion and drunk' is the wordplay.
'female companion' becomes 'wagon' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'drunk' becomes 'lit' (slang term).
'wagon'+'lit'='WAGON-LIT'
'carrying' is the link.
Can you help me to learn more?
(Other definitions for wagon-lit that I've seen before include "sleeper" , "Sleeping car on continental trains" , "Continental sleeping-car" , "In-law got injured in sleeping car" .)