City spanning both halves of Bel Air? (3,7)

I believe the answer is:

los angeles

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'city' is the definition.
(Los Angeles is an example)

I cannot understand how the remainder of the clue works.

(Other definitions for los angeles that I've seen before include "Big city" , "Californian city" , "Hollywood's city" , "city on Pacific" , "Second most populous city in the US" .)

I've seen this clue in The Times.

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