Oklahoma metropolis (5)
I believe the answer is:
tulsa
'oklahoma metropolis' 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 (only 24 hours away?)" , "OK city" , "part of Oklahoma" , "US city" , "A lust for the Oklahoma oil city?" .)