Inform comic about the Italian type of movie (4,4)
I believe the answer is:
film noir
'type of movie' is the definition.
(I know that film noir is a type of film)
'inform comic about the italian' is the wordplay.
'comic' indicates anagramming the letters.
'about' is an insertion indicator.
'the italian' becomes 'il' ('the' in Italian).
'inform' is an anagram of 'fmnoir'.
'fmnoir' placed around 'il' is 'FILM NOIR'.
(Other definitions for film noir that I've seen before include "Dark cinema genre" , "Bleak style of movie" , "1940s' genre of American thriller or detective movies (French)" , "American thriller or detective movie style of the '40s and '50s" .)