Medicinal herb sourced from an American mum in Chile (9)

I believe the answer is:

chamomile

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'medicinal herb sourced' is the definition.
I can't judge whether this definition defines the answer.

'an american mum in chile' is the wordplay.
'an american' becomes 'a' (common abbreviation - e.g. in organisation names).
'mum' becomes 'mom' (synonyms).
'in' indicates putting letters inside.
'a'+'mom'='amom'
'amom' going inside 'chile' is 'CHAMOMILE'.

'from' acts as a link.

Can you help me to learn more?

(Another definition for chamomile that I've seen is " Aromatic plant of the daisy family".)

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

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