Overpublicize (4)
I believe the answer is:
hype
'overpublicize' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hype that I've seen before include "racket" , "Overblown publicity" , "Promotional publicity" , "Slang for extravagant promotion of a product" , "Sensational publicity" .)