Broadcast song (3)

I believe the answer is:
air
I believe this clue is a double definition.
'broadcast' is the first definition.
(to air on TV)
'song' is the second definition.
(air can mean a piece of music)
(Other definitions for air that I've seen before include "It's a mixture mainly of oxygen and nitrogen" , "Sky" , "Light wind; song" , "put on radio?" , "Mixture of gases needed for breathing" .)