rockandroll Certain music genre Type of pop music Popular music Photo caption for Chris with a sandwich bun? Music genre that evolved in the '50s Music genre since the '50s HARD ... Chuck Berry's thing Chuck Berry's music Chuck Berry's medium '50s listening Ingredients in a Flintstones sandwich? Hard ___ (two, please) One word that precedes "hard," one that follows it Subject of a 1950s "revolution" With 57-Across, Queen's place What Wolfman Jack digs Pop music from the 1950s Music genre Music style Elvis' music