Extra payment (5)
I believe the answer is:
bonus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">extra payment</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 bonus that I've seen before include "Additional wage" , "Additional award" , "Additional payment for work, often on merit" , "Additional incentive payment" , "Extra income" .)