Flourishing American business admirer (2,6)

I believe the answer is:

in clover

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'flourishing american' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'business admirer' is the wordplay.
'business' becomes 'inc' (I am not sure about this - if you are sure you should believe this answer much more).
'admirer' becomes 'lover' (I've seen this before).
'inc'+'lover'='IN CLOVER'

Can you help me to learn more?

(Other definitions for in clover that I've seen before include "Having life of ease" , "Sitting pretty" , "Enjoying prosperity or luxury" .)

I've seen this clue in The Guardian.

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