North American staff working for old dictator (8)

I believe the answer is:

napoleon

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

'old dictator' is the definition.
'napoleon' can be an answer for 'dictator' (I've seen this before). I'm not sure about the 'old' bit.

'north american staff working' is the wordplay.
'north american' becomes 'na'.
'staff' becomes 'pole' (I've seen this before).
'working' becomes 'on'.
'na'+'pole'+'on'='NAPOLEON'

'for' is the link.

Can you help me to learn more?

(Other definitions for napoleon that I've seen before include "Ex-dictator" , "Emperor - brandy" , "The little French general" , "Solo, perhaps" , "Old French coin" .)

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

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