Folds, once ratings go badly (13)

I believe the answer is:

congregations

'folds' is the definition.
('congregation' can be a synonym of 'fold')

'once ratings go badly' is the wordplay.
'badly' indicates anagramming the letters.
'once'+'ratings'+'go'='onceratingsgo'
'onceratingsgo' is an anagram of 'CONGREGATIONS'.

(Another definition for congregations that I've seen is " Assemblies".)

I've seen this clue in The Telegraph.

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