Interrupts rest periods (6)
I believe the answer is:
breaks
I believe this clue is a double definition.
'interrupts' is the first definition.
(breaking is a kind of interrupting)
'rest periods' is the second definition.
(I've seen this before)
(Other definitions for breaks that I've seen before include "Rest periods" , "stretches between lessons" , "Snooker scores" , "Knocks into pieces" , "Fractures or splits" .)