Money-back deal (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">money-back deal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rebate that I've seen before include "Cash refund" , "Give back (money)" , "Refund of part of the amount paid" , "Discount - tax return?" , "Money back, partial refund" .)