Man Dr Dale treated for state of unconsciousness (9)

I believe the answer is:

dreamland

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'state of unconsciousness' is the definition.
'dreamland' can be an answer for 'unconsciousness' (thesaurus). I am unsure of the 'state of' bit.

'man dr dale treated' is the wordplay.
'treated' indicates anagramming the letters.
'man'+'dr'+'dale'='mandrdale'
'mandrdale' anagrammed gives 'DREAMLAND'.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for dreamland that I've seen before include "Sleep; ideal world" , "Utopia" , "Nod, perhaps" .)

I've seen this clue in The Times.

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