State of stupefaction (4)
I believe the answer is:
daze
'state of stupefaction' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for daze that I've seen before include "Haze, befuddlement" , "Make to feel stunned or bewildered" , "Stun using adze" , "Bewilder" , "can turn out to be stunning?" .)