Possibly berate for giving a discount (6)
I believe the answer is:
rebate
'a discount' is the definition.
(I know that rebate is a more specific form of the action discount)
'possibly berate for' is the wordplay.
'berate' anagrams to 'REBATE'.
However, I am not sure how this is indicated.
'giving' is the link.
Can you help me to learn more?
(Other definitions for rebate that I've seen before include "Refund of part of the amount paid" , "Reduction in the cost" , "Money paid back" , "Money back for beater" , "Sum paid back" .)