Canter off in daze (6)
I believe the answer is:
trance
'daze' is the definition.
(I've seen this in another clue)
'canter off' is the wordplay.
'off' is an anagram indicator.
'canter' with letters rearranged gives 'TRANCE'.
'in' is the link.
(Other definitions for trance that I've seen before include "Daze" , "Mesmerised state" , "Stupor - coma" , "Dream state" , "Nectar (anag)" .)