Staff type ... Us lot (7)

I believe the answer is:

mankind

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

'ius loti' is the definition.
I can't judge whether this defines the answer.

'staff type' is the wordplay.
'staff' becomes 'man' (manning is a kind of staffing).
'type' becomes 'kind' (I've seen this before).
'man'+'kind'='MANKIND'

Can you help me to learn more?

(Other definitions for mankind that I've seen before include "'One giant leap for - - '" , "Humanity" , "Everybody" , "all of us" , "People generally" .)

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

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