Alarming effect of the dawn chorus? (4-2,4)
I believe the answer is:
wake-up call
'the dawn chorus?' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'alarming effect' is the wordplay.
I cannot really see how this works, but
'effect' could be 'wake' (wake is a kind of effect) and 'wake' is located in the answer.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for wake-up call that I've seen before include "Shot across the bows" , "Reminder to stir" , "Something that alerts people to a bad situation" .)