Trigger gets on the radio show highlights (4,5)
I believe the answer is:
star turns
'highlights' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'trigger gets on the radio' is the wordplay.
'trigger' becomes 'start' (I can't justify this - if you can you should give a lot more credence to this answer).
'gets' becomes 'earns' (earning is a kind of getting).
'on the radio' indicates a 'sounds like' (homophone) clue.
'earns' sounds like 'urns'.
'start'+'urns'='STAR-TURNS'
'show' acts as a link.
Can you help me to learn more?
(Other definitions for star turns that I've seen before include "Top players" , "Principal performers" .)