Word starting seven California county names (3)

I believe the answer is:

san

'word starting seven california county names' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for san that I've seen before include "Hospital (abbrev.)" , "School medical facility" , "South African bushman; convalescent hospital" , "- - Francisco" , "Japanese title" .)

I've seen this clue in the Newsday.com and the Newsday.

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