Spendthrift, squanderer (7)
I believe the answer is:
wastrel
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">spendthrift</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">squanderer</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(wastrel is a kind of squanderer)</span><br/ ><br/ ></span>
(Other definitions for wastrel that I've seen before include "Profligate" , "Prodigal" , "Worthless person" , "A useless, good for nothing fellow" , "Ne'er-do-well" .)