Broadcast right artists on radio (10)
I believe the answer is:
Here is my best explanation:
'radio' is the definition.
'broadcast right artists on' is the subsidiary indication.
'broadcast' indicates an anagram.
'right' becomes 'r' (common abbreviation).
'rartistson' is an anagram of 'transistor'.
(Other definitions for transistor that I've seen before include "Electronic component" and "Semiconductor device".)