City in Oklahoma (5)
I believe the answer is:
tulsa
'city in oklahoma' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tulsa that I've seen before include "American city" , "part of Oklahoma" , "Oklahoma river port" , "Twenty-four Hours from - (Gene Pitney)" , "Oklahoma city featured in a 1960s pop song" .)