Detesting a thing being out of order (6)
I believe the answer is:
hating
'detesting' is the definition.
('hate' can be a synonym of 'detest')
'a thing being out of order' is the wordplay.
'being out of order' is an anagram indicator.
'a'+'thing'='athing'
'athing' with letters rearranged gives 'HATING'.
(Other definitions for hating that I've seen before include "Abhorring" , "Loathing" , "Disliking intensely" , "Having an aversion to" , "Detesting" .)