Moody Maureen got out of bed (6)
I believe the answer is:
morose
'moody' is the definition.
('morose' can be a synonym of 'moody')
'maureen got out of bed' is the wordplay.
'maureen' becomes 'mo' (I've seen this in other clues).
'got out of bed' becomes 'rose' (I've seen this before).
'mo'+'rose'='MOROSE'
(Other definitions for morose that I've seen before include "Sullen and moody" , "Silent, gloomy and ill-tempered" , "Sullen or glum." , "dark" , "blue" .)