### Clue: Banter in border of park? (7)
### Answer: RAILING 
 ### Explanation: Definition: Banter,border of park
  Double defn: 1st: I thought "banter" was too mild a defn. for "railing"(uttering bitter complaints or vehement denounciation), but the references also give "banter" as light-hearted raillery; and 2nd: That which defines the border,edge of a park area.