### Clue: Bubbly ruler in 2 15 (6)
### Answer: KRUGER 
 ### Explanation: Definition: 2 15
 KRUG(a champagne/bubbly made by the champagne house Krug) + ER(abbrev. for Elizabeth Regina, the British ruler).
Defn: Name of the National Park/answer to 2 15 down, in South Africa.