Shine in a good bit of radio (7)
I believe the answer is:
glisten
'shine' is the definition.
(synonyms)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for glisten that I've seen before include "gloss" , "look bright" , "Glow from reflection" , "Shine or sparkle wetly" , "Singlet (anag.); tingles (anag.)" .)