US city hospital in area north of Maine, abandoned (7)

I believe the answer is:

anaheim

I'm a little stuck... Click here to teach me more about this clue!

'us city' is the definition.
'anaheim' can be an answer for 'city' (I have seen 'Californian city' mean 'anaheim' so perhaps 'city' could also mean 'anaheim'). I'm unsure of the 'us' bit.

'hospital in area north of maine abandoned' is the wordplay.
'hospital' becomes 'H' (abbreviation for hospital).
'in' is an insertion indicator.
'area' becomes 'a' (maths abbreviation).
'north of' is a charade indicator (letters next to each other) (in a down clue, some letters go above others).
'abandoned' is an anagram indicator (the original order is abandoned).
'a'+'maine'='amaine'
'amaine' anagrammed gives 'anaeim'.
'h' placed within 'anaeim' is 'ANAHEIM'.

Can you help me to learn more?

(Other definitions for anaheim that I've seen before include "Californian city" , "Disneyland's home" .)

I've seen this clue in The Guardian.

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