US city (7)

(Other definitions for chicago that I've seen before include "America's Windy City" , "US city, original home of the skyscraper" , "3 city in the US" , "Type of bridge" , "Illinois port" .)
(Other definitions for miami that I've seen before include "I put out of action when returning" , "Florida resort city, Beach" , "US city" , "Popular sun-city of Florida" , "Sunshine city in SE Florida" .)
(Other definitions for san francisco that I've seen before include "US west coast port" , "City in California" , "US city renowned for its cable cars" , "Californian city" , "Californian port" .)
(Other definitions for new york that I've seen before include "US state, one of the original 13" , "Chrysler Building city" , "Worn key (anag.)" , "Great city called the Big Apple" , "'So good they named it twice (3,4)'" .)
'us city' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for boston that I've seen before include "Massachussetts' capital" , "Card game; Lincolnshire town" , "Sob not in the city" , "US city; card game" , "American city that once had a famous Tea Party" .)
'us city' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dallas that I've seen before include "oil centre" , "assassination site" , "City where JF Kennedy was assassinated" , "oil produced here" , "City where President Kennedy was assassinated" .)
(Other definitions for austin that I've seen before include "The capital of Texas (6)" , "Texan state capital" , "Texan city" , "Engineer" , "Capital city of Texas" .)