Discount for the new beater (6)
I believe the answer is:
rebate
'discount' is the definition.
(rebating is a kind of discounting)
'the new beater' is the wordplay.
'the new' is an anagram indicator.
'beater' with letters rearranged gives 'REBATE'.
'for' is the link.
(Other definitions for rebate that I've seen before include "Refund - discount" , "Return of, eg, tax" , "Cash refund" , "Beater (anag) -- partial refund" , "Sum paid back" .)