Partial refund (6)
I believe the answer is:
rebate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">partial refund</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rebate that I've seen before include "Partial refund, reduction in payment" , "(Eg, tax) refund" , "Refund - discount" , "Refund of part of the amount paid" , "Beater (anag) -- partial refund" .)