Emperor non-holder of an extremity of the Earth (8)

I believe the answer is:

napoleon

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'emperor' is the definition.
(I know that Napoleon has the occupation emperor)

'of an extremity of the earth' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'extremity of the earth' becomes 'poleon' (I can't justify this - if you can you should give a lot more credence to this answer).
'an' anagrammed gives 'na'.
'na'+'poleon'='NAPOLEON'

'non-holder' acts as a link.
This may not be right. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for napoleon that I've seen before include "Leading pig in Animal Farm" , "Gold twenty franc piece" , "The little French general" , "Emperor - brandy" , "In France, former sovereign" .)

I've seen this clue in the Sydney Morning Herald.

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