Event broadcast live in January (7)
I believe the answer is:
javelin
'event' is the definition.
(javelin is a kind of event)
'broadcast live in january' is the wordplay.
'broadcast' indicates an anagram (letters scattered or cast around).
'in' is an insertion indicator.
'january' becomes 'Jan' (synonyms).
'live' is an anagram of 'veli'.
'veli' going into 'jan' is 'JAVELIN'.
(Other definitions for javelin that I've seen before include "Spear thrown in competitive sport" , "Spear for throwing" , "Spear for field event" , "Long spear" , "Athletics missile" .)