Worries stones must contain it (8)
I believe the answer is:
agitates
'worries' is the definition.
The answer and definition can be both to do with contact as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?
'stones must contain it' is the wordplay.
'stones' becomes 'agates' (I've seen this before).
'must contain' indicates putting letters inside.
'agates' placed around 'it' is 'AGITATES'.
Can you help me to learn more?
(Other definitions for agitates that I've seen before include "Tries to stir up public opinion" , "Upsets" , "Disturbs, often politically" , "Disturbs or stirs up political trouble" .)