Half-conscious state (6)
I believe the answer is:
trance
'half-conscious state' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for trance that I've seen before include "Dazed state" , "Canter into state of hypnosis" , "State of abstraction" , "Ecstasy" , "State or period of unconsciousness" .)