Resident of China reaching a high level with comfort, we’re told (9)
I believe the answer is:
pekingese
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for pekingese that I've seen before include "Small dog (from China?)" , "Barker" , "Snub-nosed lapdog" , "Mandarin" .)