Encloses youngster, holding key points (7)

'encloses' is the definition.
The answer and definition can be both to do with contact as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?

'youngster holding key points' is the wordplay.
I cannot quite understand how this works, but
'key' could be 'g' (musical key) and 'g' is present in the answer.
'points' could be 'es' (E is an example) and 'es' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?