Uproar where old woman needs heart transplant (6)

I believe the answer is:

bedlam

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'uproar' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for bedlam that I've seen before include "Scene of uproar and confusion" , "Very noisy confused place" , "Blamed for 9 across? (8)" , "Blamed for confused uproar" , "Blames for uproar" .)

I've seen this clue in The Independent.

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