City on the Arkansas River (5)
I believe the answer is:
tulsa
'city on the arkansas river' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tulsa that I've seen before include "Oklahoma city featured in a 1960s pop song" , "Twenty-four Hours from - (Gene Pitney)" , "A lust for the Oklahoma oil city?" , "City in Oklahoma featured in a 60s song" , "OK city" .)