American music group’s good general beat (4,4)
I believe the answer is:
glee club
'american music group's good general beat' is the definition.
I can't judge whether this definition defines the answer.
'good general beat' is the wordplay.
'good' becomes 'g' (abbreviation).
'general' becomes 'Lee' (Robert E. Lee - US revolutionary commander).
'beat' becomes 'club' (to hit with a club).
'g'+'lee'+'club'='GLEE CLUB'
Can you help me to learn more?
(Other definitions for glee club that I've seen before include "Society for singing part songs" , "Group of singers" , "Group singing part-songs" , "Choir" .)