Cover-up partition, says Spooner — it interrupts sleep (4-2,4)
I believe the answer is:
wake-up call
'partition says spooner it interrupts sleep' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'cover-up' is the wordplay.
I cannot quite understand how this works, but
'up' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for wake-up call that I've seen before include "Reminder to stir" , "Shot across the bows" , "Something that alerts people to a bad situation" .)