Support Finland with AI CIA supply (9,3)

I believe the answer is:

financial aid

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

'support' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'finland with ai cia supply' is the wordplay.
'with' is a charade indicator (letters next to each other).
'supply' indicates anagramming the letters (in a supple way).
'ai'+'cia'='aicia'
'finland' after 'aicia' is 'aiciafinland'.
'aiciafinland' anagrammed gives 'FINANCIAL AID'.

Can you help me to learn more?

I've seen this clue in The Everyman puzzle in The Observer.

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