Amount of film about flat deserted US city (9)
I believe the answer is:
cleveland
'us city' is the definition.
(city in Ohio)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for cleveland that I've seen before include "US President?" , "Northeast English county, created 1974" , "former President" , "past president" , "Democrat leader once" .)