Slum area (6)
I believe the answer is:
ghetto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slum area</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 ghetto that I've seen before include "Run-down area" , "Ethic quarter" , "Place for minority" , "Part of city occupied by minority group, like old Jewish quarter" , "poor part of town" .)