Was it a long song? Was the radio station a free format station or top 40?
Atom Heart Mother by Pink Floyd released in 1970 kind of fits your description
https://www.youtube.com/watch?v=Fku7hi5kI-c
Atom Heart Mother by Pink Floyd released in 1970 kind of fits your description
https://www.youtube.com/watch?v=Fku7hi5kI-c