Surprisingly Internet meant fun (13)
I believe the answer is:
entertainment
'fun' is the definition.
(thesaurus)
'surprisingly internet meant' is the wordplay.
'surprisingly' is an anagram indicator.
'internet'+'meant'='internetmeant'
'internetmeant' is an anagram of 'ENTERTAINMENT'.
(Other definitions for entertainment that I've seen before include "sport" , "Provision of hospitality" , "Amusement; hospitality" , "Public show; hospitality" , "Source of amusement" .)