Buy back (6)
I believe the answer is:
redeem
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">buy back</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for redeem that I've seen before include "Save from sin or error" , "Save, perhaps from pawn" , "rescue" , "Free - retrieve" , "Save from hell or recover from pawn" .)