Do travellers have a terribly long wait to get one? (5-3)
I believe the answer is:
wagon-lit
'wait to get one?' is the definition.
I can't tell whether this defines the answer.
'do travellers have a terribly long' is the wordplay.
'do travellers' becomes 'wait' (I am not sure about this - if you are sure you should believe this answer much more).
'have' is an insertion indicator.
'a terribly' indicates an anagram.
'long' anagrammed gives 'gonl'.
'wait' going around 'gonl' is 'WAGON-LIT'.
Can you help me to learn more?
(Other definitions for wagon-lit that I've seen before include "sleeper" , "In-law got injured in sleeping car" , "Continental sleeping-car" , "Sleeping car on continental trains" .)