You might inspire this song (3)
I believe the answer is:
air
'this song' is the definition.
(air can mean a piece of music)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for air that I've seen before include "Ventilate with oxygen" , "Broadcast; atmosphere" , "Ventilate a tune?" , "Gas mixture required for breathing" , "Mix of gases surrounding the earth" .)