Got into a bed, drunk (8)
I believe the answer is:
Here is my best explanation:
'got' is the definition.
(obtaining is a kind of getting)
'into a bed drunk' is the subsidiary indication.
'drunk' is an anagram indicator.
'intoabed' is an anagram of 'obtained'.
(Other definitions for obtained that I've seen before include "Acquired", "Into a bed (anag.)", "Procured", "Got, procured", "Came into possession of" and "Got something".)