Singer delivering note on radio (5)
I believe the answer is:
tenor
'singer' is the definition.
(I know that tenor is a type of singer)
'note on radio' is the wordplay.
'note' becomes 'tenner' (a tenner is a 10 pound note).
'on radio' shows a homophone (sound like).
'tenner' is a homophone of 'TENOR'.
'delivering' acts as a link.
(Other definitions for tenor that I've seen before include "General course - male singer" , "Male singer with high register" , "General meaning of a male voice" , "Highest male voice" , "Singer (one of three?)" .)