Abatement (3-2)
I believe the answer is:
let-up
'abatement' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for let-up that I've seen before include "Abatement" , "Respite, relief" , "Pause, temporary respite" , "Relieving pause" , "Pause in intensity" .)