Big spender (4,6)
I believe the answer is:
high roller
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">big spender</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for high roller that I've seen before include "I bet" , "... "tsunami"" , "He takes big risks" .)