Disruption to El Nino connected to Internet (6)
I believe the answer is:
online
'connected to internet' is the definition.
(online means with access to the internet)
'disruption to el nino' is the wordplay.
'disruption' is an anagram indicator.
'el'+'nino'='elnino'
'elnino' is an anagram of 'ONLINE'.
(Other definitions for online that I've seen before include "Currently surfing?" , "connected to network" , "Accessible by computer" , "Peg is often" , "connected to the internet" .)