Crossword Genius

Rich European takes the place of American that smells? (8)

Ross

I believe the answer is:

effluent

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This could be a double definition.

'rich' is the first definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

'european takes the place of american that smells?' is the second definition.
Although both the answer and definition are adjectives, I don't see how they can define each other.

Can you help me to learn more?

(Other definitions for effluent that I've seen before include "Liquid industrial waste" , "Outflow of liquid waste matter" , "sewage" , "Sewer water" , "Waste water" .)

I've seen this clue in The Independent.
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