Music we all need (3)
I believe the answer is:
air
'music' is the definition.
(air is a kind of music)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for air that I've seen before include "put on radio?" , "in which birds fly around" , "Light breeze" , "Bearing, manner" , "Spread publicity" .)