Those left to take a break (4)
I believe the answer is:
rest
I believe this is a double definition.
'those left' is the first definition.
(I've seen this in other clues)
'take a break' is the second definition.
(to have a rest is to take a break)
'to' is the link.
(Other definitions for rest that I've seen before include "lean" , "What's left over" , "Lie down" , "Remainder; be inactive" , "Holiday" .)