Classroom break (6)
I believe the answer is:
recess
'classroom break' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for recess that I've seen before include "Temporary suspension of a session" , "take time out" , "Niche, alcove" , "State of abeyance or suspended business" , "'Niche, inlet (6)'" .)