In total disbelief, initially, somehow see live broadcast (9)
I believe the answer is:
televised
'broadcast' is the definition.
(thesaurus)
'in total disbelief initially somehow see live' is the wordplay.
'in' is an insertion indicator.
'initially' suggests taking the first letters.
'somehow' indicates an anagram.
The initial letters of 'total disbelief' is 'td'.
'see'+'live'='seelive'
'seelive' anagrammed gives 'elevise'.
'td' going around 'elevise' is 'TELEVISED'.
(Other definitions for televised that I've seen before include "Shown on the box" , "screened" , "Broadcast" , "Put on" .)