Squanderer, prodigal (11)
I believe the answer is:
spendthrift
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">squanderer</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(spendthrift is a kind of squanderer)</span><br/ ><br/ >'<span class="explanation-format__original">prodigal</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that prodigal can be written as spendthrift)</span><br/ ><br/ ></span>
(Other definitions for spendthrift that I've seen before include "Profligate" , "Irresponsible user of money" , "Squanderer" , "Irresponsible spender" , "Extravagantly spending person" .)