Oklahoman city (5)
I believe the answer is:
tulsa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oklahoman city</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 tulsa that I've seen before include "Twenty-four Hours from - (Gene Pitney)" , "part of Oklahoma" , "An OK place" , "Oklahoma city featured in a 1960s pop song" , "American city" .)