### Clue: Plain background – it disappeared from Berlin leader's place? (9)
### Answer: WALLPAPER 
 ### Explanation: Definition: Plain background
 WALL(the one in Berlin which disappeared/came down in 1989) + PAPER(or newspaper, where you'd find a leader;a leading editorial).
Defn: Something plain and bland that provides an unobtrusive background, as in "wallpaper music".