Marginal consciousness (6)
I believe the answer is:
stupor
'marginal consciousness' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stupor that I've seen before include "Shock - Proust (anag)" , "that'll send you to sleep" , "Apathy" , "mental dullness?" , "Proust found in dazed condition" .)