Large urban area (4)
I believe the answer is:
city
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large urban area</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 city that I've seen before include "See 5" , "Densely populated urban area" , "Tokyo, for example" , "Town with cathedral" , "Urban centre" .)