Deep stupor (8)
I believe the answer is:
narcosis
'deep stupor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for narcosis that I've seen before include "suffering from drugs" , "Drug-induced state" , "State of sleep produced by drugs" , "Drowsiness produced by a drug" , "Drugged stupor (medic.)" .)