Crossword Genius

Stallholders badly affected by rich stores (10)

Ross

I believe the answer is:

choristers

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'stallholders badly' is the definition.
I can't judge whether this definition defines the answer.

'affected by rich stores' is the wordplay.
'affected' indicates an anagram.
'by' says to put letters next to each other.
'rich' put after 'stores' is 'storesrich'.
'storesrich' anagrammed gives 'CHORISTERS'.

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I've seen this clue in The Irish Independent.
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