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