Mood — disposition (11)
I believe the answer is:
temperament
I believe this clue is a double definition.
'mood' is the first definition.
(I know that temperament is a type of mood)
'disposition' is the second definition.
(I know that disposition can be written as temperament)
(Other definitions for temperament that I've seen before include "Piano tuning; character" , "A person's nature as it affects behaviour" , "Person's nature; adjustment in piano tuning" , "Frame of mind" , "Personality" .)