Use the internet and start to enjoy it in abundance (7)
I believe the answer is:
surfeit
'abundance' is the definition.
(surfeit is a kind of abundance)
'use the internet and start to enjoy it' is the wordplay.
'use the internet' becomes 'surf' (I've seen this in another clue).
'and' means one lot of letters go next to another.
'start to' suggests taking the first letters.
The initial letter of 'enjoy' is 'e'.
'surf'+'e'+'it'='SURFEIT'
'in' is the link.
(Other definitions for surfeit that I've seen before include "Excess, glut" , "Superabundance" , "Overindulgence" , "excessive amount" , "Fustier (anag)" .)