Detesting a night that's wild (6)
I believe the answer is:
hating
'detesting' is the definition.
('hate' can be a synonym of 'detest')
'a night that's wild' is the wordplay.
'that's wild' indicates anagramming the letters.
'a'+'night'='anight'
'anight' anagrammed gives 'HATING'.
(Other definitions for hating that I've seen before include "Detesting" , "Abhorring" , "Loathing" , "Having an aversion to" , "Disliking intensely" .)