Scold for changing rebate (6)
I believe the answer is:
berate
'scold' is the definition.
(I know that scold can be written as berate)
'changing rebate' is the wordplay.
'changing' indicates anagramming the letters.
'rebate' is an anagram of 'BERATE'.
'for' acts as a link.
(Other definitions for berate that I've seen before include "Scold about rebate" , "Scold or chide severely" , "Scold, censure" , "Rebuke" , "Chastise" .)