### Clue: Climatologists study this in one complex around Lima (2,4)
### Answer: EL NINO 
 ### Explanation: Definition: Climatologists study this

***(in one)** [anag:*complex*] *around*** L** (Lima, in the phonetic alphabet)
 

 
*El Niño is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean.