Obedience school item (5)
I believe the answer is:
leash
'obedience school item' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leash that I've seen before include "Strip for leading, a dog say" , "Rope or chain restraint" , "Rope to control dog" , "Line for controlling a dog" , "Rope used to restrain an animal" .)