I can get into alternate affirms with these citizens (8)

I believe the answer is:

africans

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'alternate affirms with these citizens' is the definition.
The definition suggests an adverb but the answer is not.

'i can get into' is the wordplay.
'i' becomes 'a'.
'get' is an insertion indicator.
'into' becomes 'fris' (I can't explain this - if you can you should give a lot more credence to this answer).
'can' going within 'fris' is 'fricans'.
'a'+'fricans'='AFRICANS'

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(Another definition for africans that I've seen is " Libyans?".)

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

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