Adamson rising before morning for Psycho? (6)

I believe the answer is:

maniac

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'for psycho?' is the definition.
(I've seen this before)

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

(Other definitions for maniac that I've seen before include "Nutter" , "Insane person" , "Wild, perhaps violent, type" , "Obsessive enthusiast" , "Lunatic, madman" .)

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

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