Herb makes money here! (4)

I believe the answer is:

mint

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'herb' is the definition.
(I know that mint is a type of herb)

'money here' is the wordplay.
'money' becomes 'm' (abbreviation in economics).
'here' becomes 'int' (I can't justify this - if you can you should believe this answer much more).
'm'+'int'='MINT'

'makes' is the link.

Can you help me to learn more?

(Other definitions for mint that I've seen before include "Fragrant herb" , "sweet herb" , "Where money is made by the government" , "lots of money" , "Large sum of money" .)

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

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