Vacuously bizarre dance music, jazz style (5)
I believe the answer is:
bebop
'jazz style' is the definition.
(I've seen this before)
'vacuously bizarre dance' is the wordplay.
'vacuously' means to remove the middle letters.
'dance' becomes 'bop' (bopping is a kind of dancing).
'bizarre' with its middle removed is 'be'.
'be'+'bop'='BEBOP'
'music' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for bebop that I've seen before include "Monk composed this" , "Type of jazz" , "Syncopated 1940s' jazz" , "1940s' form of modern jazz" , "Jazzy music style" .)