Places to get better things like doughnuts, in the capital (9)

I believe the answer is:

sanatoria

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But I can't explain it at all! Could you help me understand?

(Other definitions for sanatoria that I've seen before include "Hospitals for recuperation" , "nursing homes?" , "Treatment centres" , "Convalescent hospitals" , "Lodgings for patients" .)

I've seen this clue in The Hindu.

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