Stops said to be for rest periods (6)
I believe the answer is:
breaks
This might be a double definition.
'stops' is the first definition.
('break' can be a synonym of 'stop')
'to be for rest periods' is the second definition.
(I've seen this before)
'said' acts as a link.
This may not be correct. It may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for breaks that I've seen before include "Snooker scores" , "Rest periods" , "Shatters" , "Ruptures" , "Fractures or splits" .)