Person owing money (6)
I believe the answer is:
debtor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">person owing money</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for debtor that I've seen before include "Person owing money" , "Borrower" , "Someone owing money" , "One who owes money" , "Opposite of creditor" .)