Madness, insanity (11)

I believe the answer is:

derangement

I believe this is a double definition.

'madness' is the first definition.
(I know that derangement is a type of madness)

'insanity' is the second definition.
(I know that derangement is a type of insanity)

(Other definitions for derangement that I've seen before include "Disorder; insanity" , "Madness; disorder" .)

I've seen this clue in the Sydney Morning Herald.

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