Get out of bed and show up (6)
I believe the answer is:
debunk
I believe this is a double definition.
'get out of bed' is the first definition.
(de-bunk could mean to get out of a bunk)
'show up' is the second definition.
(show up as false)
'and' acts as a link.
(Other definitions for debunk that I've seen before include "Expose (pretentious claims?)" , "Reveal as false, show up" , "Expose false claim" , "Show to be falsely honoured" , "Ridicule" .)