Noted dukedom (4)
I believe the answer is:
york
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">noted dukedom</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for york that I've seen before include "attempt to get out at the Oval" , "City and royal house" , "10 [HOUSE]" , "See bowl" , "Northern walled city" .)