Totally gone — as may be ceiling? (9)
I believe the answer is:
plastered
I believe this is a double definition.
'totally gone' is the first definition.
('plastered' and 'gone' can both mean very drunk)
'as may be ceiling?' is the second definition.
(Other definitions for plastered that I've seen before include "Pickled" , "Drunk - applied coating to a wall" , "Might ceilings be" , "Smashed" , "Coated thickly, being slangily drunk" .)