Internet in uproar about adult host (9)
I believe the answer is:
entertain
'host' is the definition.
(thesaurus)
'internet in uproar about adult' is the wordplay.
'in uproar' indicates anagramming the letters (I've seen this in other clues).
'about' is an insertion indicator.
'adult' becomes 'a'.
'internet' is an anagram of 'entertin'.
'entertin' going around 'a' is 'ENTERTAIN'.
(Other definitions for entertain that I've seen before include "cheer" , "Put up" , "Amuse, divert" , "what the party host will do" , "Think about" .)