Canter off in a daze (6)
I believe the answer is:
trance
'daze' is the definition.
(I've seen this before)
'canter off' is the wordplay.
'off' is an anagram indicator.
'canter' with letters rearranged gives 'TRANCE'.
'in a' acts as a link.
(Other definitions for trance that I've seen before include "Catalepsy" , "Sleep-like state experienced in canter" , "Ecstasy" , "State of a medium in a seance" , "Canter into suspended animation" .)