City NNW of Oklahoma City (4)
I believe the answer is:
enid
'city nnw of oklahoma city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for enid that I've seen before include "Geraint's loved one" , "Dine with Ms blyton, writer" , "Arthurian wife" , "Woman" , "Lady" .)