Slows down, having time off from worries (5)
I believe the answer is:
eases
'slows' is the definition.
The answer and definition can be both related to change as well as being verbs in their -s form.
Maybe you can see an association between them that I can't see?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for eases that I've seen before include "Makes less severe" , "Alleviates, relieves" , "Facilitates" , "Relieves, lightens" , "Assuages or slackens" .)