Broadcast from excellent band (6)
I believe the answer is:
airing
'broadcast' is the definition.
(to air is to broadcast on TV)
'excellent band' is the wordplay.
'excellent' becomes 'ai' (resembles 'A1', old-fashioned term for excellent).
'band' becomes 'ring' (a ring is a band of metal).
'ai'+'ring'='AIRING'
'from' acts as a link.
(Other definitions for airing that I've seen before include "excursion" , "Exposure" , "Publicity" , "Broadcasting" , "Expressing (a grievance) publicly" .)