Money paid for release (6)
I believe the answer is:
ransom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">money paid for release</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 ransom that I've seen before include "A kidnapper demands it" , "Kidnapper's payoff" , "Redeem" , "Payment, eg to kidnapper" , "delivery charge" .)