Amount of money (3)
I believe the answer is:
sum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">amount of money</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sum that I've seen before include "Whole" , "Amount of money; add" , "Arithmetical problem" , "Mathematical problem" , "Total; problem" .)