Plot followed on audio? (5)
I believe the answer is:
tract
'plot' is the definition.
(land)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for tract that I've seen before include "anthem" , "Region; pamphlet" , "Printed leaflet" , "Pamphlet, large expanse of land" , "Religious treatise" .)