Training worries (9)
I believe the answer is:
exercises
This clue could be a double definition.
'training' is the first definition.
(I know this)
'worries' is the second definition.
The definition and answer can be both related to thinking as well as being verbs in their -s form.
Maybe there's a link between them I don't understand?
Can you help me to learn more?
(Other definitions for exercises that I've seen before include "Multiple repetitions to train" , "Muscle movements to promote fitness" , "Works out" , "trains" , "Exertions to develop endurance or skill" .)