Crossword Genius

Superlatively oriental (11)

Ross

I believe the answer is:

easternmost

I'm a little stuck... Click here to teach me more about this clue!

'oriental' is the definition.
(thesaurus)

'superlatively' is the wordplay.
I cannot quite understand how this works, but
'superlatively' could be 'most' (I've seen this in another clue) and 'most' is present in the answer.
The remaining letters 'eastern' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

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" .)

I've seen this clue in The Irish Independent.
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