Crossword Genius

Cosmetic discovered, abhorrent to American (10,5)

Ross

I believe the answer is:

foundation cream

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

'cosmetic' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'discovered abhorrent to american' is the wordplay.
I cannot quite see how this works, but
'discovered' could be 'found' (to discover is to find) and 'found' is present in the answer.
'american' could be 'am' (abbreviation in some contexts) and 'am' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Telegraph.
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