Don't mind so much running — it's a good example (6,6)
I believe the answer is:
object lesson
'good example' is the definition.
I cannot understand how the remainder of the clue works.
(Other definitions for object lesson that I've seen before include "shows what one should do" , "Example typifying a principle" , "punishment intended as a warning to others?" , "Instructive experience" , "What may be striking" .)