Run in a trance, perhaps (6)
I believe the answer is:
canter
'run' is the definition.
(I've seen this in another clue)
'trance perhaps' is the wordplay.
'perhaps' indicates an anagram.
'trance' with letters rearranged gives 'CANTER'.
'in a' acts as a link.
(Other definitions for canter that I've seen before include "Pace of a horse between trot and gallop" , "Gentle movement in bay, say" , "pace near a gallop" , "Moderate pace for horse" , "Trance (anag) - horse's pace" .)