Slight drag returning after crazy rides (9)
I believe the answer is:
disregard
'slight' is the definition.
(synonyms)
'drag returning after crazy rides' is the wordplay.
'returning' shows that the letters should be reversed in order.
'after' says to put letters next to each other.
'crazy' indicates anagramming the letters.
'drag' backwards is 'gard'.
'rides' with letters rearranged gives 'disre'.
'gard' after 'disre' is 'DISREGARD'.
(Other definitions for disregard that I've seen before include "Push aside" , "Overlook - inattention" , "Neglect, ignore" .)