Equipment for school governors after dark (10)
I believe the answer is:
blackboard
'equipment for school' is the definition.
I can't tell whether this definition defines the answer.
'governors after dark' is the wordplay.
'governors' becomes 'board' (the board is composed of governors in some orgs).
'after' says to put letters next to each other.
'dark' becomes 'black' (similar in meaning).
'board' put after 'black' is 'BLACKBOARD'.
Can you help me to learn more?
(Other definitions for blackboard that I've seen before include "something to write on" , "What's written on in the classroom" , "Teaching aid" , "where he might chalk up a win" , "Traditional teacher's aid" .)