Big money (9)
I believe the answer is:
megabucks
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">big money</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for megabucks that I've seen before include "A fortune!" , "large sum of money" , "Vast sums of money" , "Loads of money" , "Huge money" .)