Red Queen’s disposition (5)
I believe the answer is:
cheer
'disposition' is the definition.
(thesaurus)
'red queen's' is the wordplay.
'red' becomes 'che' (Che Guevara the Marxist revolutionary).
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'che'+'er'='CHEER'
(Other definitions for cheer that I've seen before include "pair of hips can get me going!" , "Vocal sound of applause" , "Shout of praise or joy" , "Hearten; shout" , "Shout of encouragement" .)