One politely roused wont experience this (4,9)
I believe the answer is:
rude awakening
'one' is the definition.
Both the answer and definition are adjectives.
Perhaps there's a link between them I don't understand?
'politely roused wont experience this' is the wordplay.
I cannot quite see how this works, but
'roused' could be 'awake' (I've seen this in another clue) and 'awake' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rude awakening that I've seen before include "Unwelcome alarm call?" , "Unpleasant disillusionment" .)