Love new tune being broadcast (2,3)
I believe the answer is:
on air
'being broadcast' is the definition.
(on air on radio or TV)
'love new tune' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'tune' becomes 'air' (air can mean a piece of music).
'o'+'n'+'air'='ON AIR'
(Other definitions for on air that I've seen before include "very happily?" , "If you're really happy, you'll float here" , "Broadcasting live" , "put out" , "(Walking) elatedly" .)