As oriental as possible! (11)
I believe the answer is:
easternmost
'as oriental as possible' is the definition.
I can't judge whether this definition defines the answer.
'oriental as possible' is the wordplay.
'oriental' becomes 'eastern' (synonyms).
'as possible' becomes 'most' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'eastern'+'most'='EASTERNMOST'
Can you help me to learn more?
(Other definitions for easternmost that I've seen before include "extreme geographical location" , "closest to where the sun rises" , "on the extreme right, conventionally" , "Furthest from the west" .)