High or drunk (6)
I believe the answer is:
stoned
This clue is a double definition.
'high' is the first definition.
(on drugs)
'drunk' is the second definition.
(I know that stoned is a more specific form of the attribute drunk)
(Other definitions for stoned that I've seen before include "Slangily drunk or drugged" , "Completely under the influence" , "attacked with missiles" , "with jewels" , "Stephen thus martyred" .)