TV channel doesn't show very popular dance music (5)
I believe the answer is:
disco
'popular dance music' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for disco that I've seen before include "Demonic spirit" , "Youngsters' dance venue" , "20 club" , "lively entertainment, for some?" , "party for dancers" .)