Broadcast channel lacking in refinement (6)
I believe the answer is:
coarse
'broadcast' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I don't see?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for coarse that I've seen before include "Rough, uncouth" , "Rough or rude" , "Rude, vulgar" , "Rough in texture, or vulgar" , "Unpolished -- ribald" .)