City hospital brought up regarding some organs (5)

I believe the answer is:

nasal

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'regarding some organs' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'city hospital brought up' is the wordplay.
'city' becomes 'LA' (Los Angeles).
'hospital' becomes 'san' (I've seen this before).
'brought up' says the letters should be written in reverse (in a down clue, letters go up).
'la'+'san'='lasan'
'lasan' backwards is 'NASAL'.

Can you help me to learn more?

(Other definitions for nasal that I've seen before include "Rhinal" , "Concerning the nose" , "Like a twang" , "old face-saver" , "Twangy" .)

I've seen this clue in The Sunday Times.

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