Intrudes upon models, after sending note over (7)
I believe the answer is:
imposes
'intrudes' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their -s form.
Maybe there's a link between them I don't understand?
'upon models after sending note over' is the wordplay.
'upon' means one lot of letters go next to another.
'models' becomes 'poses' ('pose' can be a synonym of 'model').
'after sending note' becomes 'mi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'over' says the letters should be written in reverse.
'mi' in reverse letter order is 'im'.
'poses' put after 'im' is 'IMPOSES'.
Can you help me to learn more?
(Other definitions for imposes that I've seen before include "taxes" , "Pushes" , "Sets as a task" , "Forces oneself on or takes advantage of" , "Inflicts upon" .)