Here are the possible solutions for describing some modern music clue
Answer
Clue
Relevancy
fab
Clue
Word before Four, when describing the Beatles, or Five, when describing Van Halen, or Fifteen, when describing a band I just made up with 15 awesome harpists
Definition
excellent
atonal
Clue
Describing some modern music
Definition
not referring to any scale or tonic
saloon
Clue
Describing a bar — describing a car
serial
Clue
Describing certain modern music
poptastic
Clue
Portmanteau word describing some great music ... or, initially, four answers in this puzzle
Definition
denoting or relating to a very good piece of pop music
nostradamus
Clue
French prophet whose predictions are often shoehorned into describing modern events
per
Clue
Beats ___ minute (term often used when describing electronic music)