Joker's trick involving TV, newspapers, etc (8)
I believe the answer is:
comedian
'joker's' is the definition.
(I've seen this before)
'trick involving tv newspapers etc' is the wordplay.
'trick' becomes 'con' (a con is a fraud or trick).
'involving' indicates putting letters inside.
'tv newspapers etc' becomes 'media' (TV and newspapers are part of the media).
'con' placed around 'media' is 'COMEDIAN'.
(Other definitions for comedian that I've seen before include "performer" , "Funny entertainer" , "Demoniac (anag.)" , "Humorous entertainer" , "Cracker?" .)