Eerie story's beginnings in sonorous echo
I believe the answer is:
re-sound
'echo' is the definition.
(I've seen this before)
'eerie story's beginnings in sonorous' is the wordplay.
'beginnings' indicates taking the first letters.
'in' indicates putting letters inside.
'sonorous' becomes 'round' (I can't justify this - if you can you should believe this answer much more).
The first letters of 'eerie storys' is 'es'.
'es' placed inside 'round' is 'RE-SOUND'.
Can you help me to learn more?
(Other definitions for re-sound that I've seen before include "Reverberate" , "Ring, boom, echo" .)