Extreme greed (7)
I believe the answer is:
avarice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">extreme greed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for avarice that I've seen before include "Stinginess" , "Extreme greed for wealth" , "Insatiable lust" , "Parsimony" , "Rapacity" .)