A doctor is among company backing support for Asian country (8)
I believe the answer is:
cambodia
'for asian country' is the definition.
(country in Asia)
'a doctor is among company backing support' is the wordplay.
'doctor' becomes 'MB' (Bachelor of Medicine).
'is among' indicates putting letters inside (inserted letters are placed among others).
'company' becomes 'co' (abbreviation).
'backing support' becomes 'dia' (I can't explain this - if you can you should give a lot more credence to this answer).
'a'+'mb'='amb'
'amb' put within 'co' is 'cambo'.
'cambo'+'dia'='CAMBODIA'
Can you help me to learn more?
(Other definitions for cambodia that I've seen before include "Country, part of Indochina under French rule until 1953" , "A nation in southeastern Asia" , "Oriental country" , "Country of SW Asia, capital Phnom Penh" , "SE Asian nation" .)