Teachers' cane (5)
I believe the answer is:
staff
I believe this clue is a double definition.
'teachers'' is the first definition.
(school staff)
'cane' is the second definition.
(I know that cane can be written as staff)
(Other definitions for staff that I've seen before include "teachers employed in school" , "Rod - workforce" , "Stick of authority" , "teachers possibly used" , "support for notes" .)