Break partly cures this (4)
I believe the answer is:
rest
'break' is the definition.
(a rest is taking a break)
'partly cures this' is the wordplay.
'partly' indicates a hidden word (part of the clue is used).
'REST' is hidden in the letters of 'cures this'.
(Other definitions for rest that I've seen before include "Inactivity" , "Support for putting things on" , "Leisure" , "Others; cease work" , "'Relax, pause from work (4)'" .)