Sordid gain (5)
I believe the answer is:
lucre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sordid gain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lucre that I've seen before include "Ulcer (anag)" , "Possession of the rich" , "Scornful word for money that may be 1 Across" , "(Filthy) profit" , "monetary gain" .)