I believe the answer is:
'jogging gait' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trot that I've seen before include "Fairly brisk pace" , "movement of H [TROT]" , "Radical socialist (abbr) - horse gait" , "Gait between a walk and a canter" , "Follower of revolutionary" .)