Geordie teacher got up out of bed (5)
I believe the answer is:
risen
'out of bed' is the definition.
(I've seen this before)
'geordie teacher got up' is the wordplay.
'geordie' becomes 'ne' (I've seen this in other clues).
'teacher' becomes 'sir' (I've seen this before**).
'got up' says the letters should be written in reverse.
'ne'+'sir'='nesir'
'nesir' in reverse letter order is 'RISEN'.
(Other definitions for risen that I've seen before include "Proved" , "Gone up" , "Got up" , "Ascended - revolted" , "Moved up" .)