Chattering on about how good the story is? (8)
I believe the answer is:
rattling
'chattering' is the definition.
(I've seen this before)
'on about how good the story is?' is the wordplay.
I cannot really understand how this works, but
'on' could be 'at' (I've seen this in other clues) and 'at' is found within the answer.
'good' could be 'g' (abbreviation) and 'g' is located in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rattling that I've seen before include "Travelling at great speed" , "Making short hard sounds" , "Is loosely attached item" , "Extraordinarily good, for a snake?" , "Quick and energetic" .)