In excess, announced what to do with the internet (7)
I believe the answer is:
surfeit
'in excess' is the definition.
'surfeit' can be an answer for 'excess' (I've seen this before). I am not sure about the 'in' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for surfeit that I've seen before include "stuff, once" , "Fustier (anag)" , "excessive amount" , "Overindulgence" , "it's more than one needs" .)