A smash hit is a term used to describe an extremely successful piece of media, such as a movie, song, or book. The crossword solutions for the term 'smash hit' include 'SENSATION' (9 letters), 'SELLOUT' (7 letters), 'WOW' (3 letters), 'BUSTER' (6 letters), 'homerun' (7 letters), 'numberone' (9 letters), and 'BLOCKBUSTER' (11 letters). These words all suggest that the media in question has achieved a great level of success, with 'SENSATION' and 'BLOCKBUSTER' implying a particularly high level of popularity.