Verbal rebuke comes from me when surrounded by terrible chattiness (12)
I believe the answer is:
chastisement
'verbal rebuke' is the definition.
'chastisement' can be an answer for 'rebuke' (chastisement is a kind of rebuke). I am not certain of the 'verbal' bit.
'me when surrounded by terrible chattiness' is the wordplay.
'when surrounded by' means one lot of letters goes inside another.
'terrible' indicates an anagram.
'chattiness' is an anagram of 'chastisent'.
'me' put inside 'chastisent' is 'CHASTISEMENT'.
'comes from' acts as a link.
Can you help me to learn more?
(Other definitions for chastisement that I've seen before include "Severe reprimand" , "Beating" , "Old fashioned discipline" .)