### Clue: It causes climatic changes in '09, westbound around Lima (2,4)
### Answer: EL NINO 
 ### Explanation: Definition: It causes climatic changes
 **Reversal of**(…, westbound, in an across clue) [ O(letter representing "0") + NINE("9") ] **containing**(around) L(letter represented by "Lima" in the phonetic alphabet).
Answer:   A warming of the surface water of the tropical eastern region of the Pacific Ocean, causing climatic changes in amongst others, Peru, the capital of which is Lima.