Confirm breakdown of live data (8)
I believe the answer is:
validate
'confirm' is the definition.
(I know that validate is a more specific form of confirm)
'breakdown of live data' is the wordplay.
'breakdown of' indicates an anagram (I've seen 'breakdown' mean this).
'live'+'data'='livedata'
'livedata' is an anagram of 'VALIDATE'.
(Other definitions for validate that I've seen before include "Prove" , "stand by" , "Confirm as true" , "Confirm correctness of" , "Declare legally acceptable" .)