Time left in America — in Oklahoma City (5)
I believe the answer is:
tulsa
'oklahoma city' is the definition.
(I've seen this before)
'time left in america' is the wordplay.
'time' becomes 't' (abbreviation).
'left' becomes 'l' (common abbreviation).
'in' is an insertion indicator.
'america' becomes 'usa' (United States of America).
'l' going inside 'usa' is 'ulsa'.
't'+'ulsa'='TULSA'
'in' is the link.
(Other definitions for tulsa that I've seen before include "Where in the States" , "City in Oklahoma featured in a 60s song" , "Oklahoma city featured in a 1960s pop song" , "Major oil centre" , "Twenty-four Hours from - (Gene Pitney)" .)