This may be launched and broadcast live in January (7)
I believe the answer is:
javelin
'this may be launched' is the definition.
(I know this)
'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' inserted into 'jan' is 'JAVELIN'.
'and' is the link.
(Other definitions for javelin that I've seen before include "Spear thrown in competitive sport" , "Field event projectile" , "Sporting spear" , "It's thrown in a field event" , "Athletics missile" .)