Group of beats performing for a powerful businessman (5)
I believe the answer is:
baron
'a powerful businessman' is the definition.
(I've seen this before)
'group of beats performing' is the wordplay.
'group of beats' becomes 'bar' (I am not sure about this - if you are sure you should believe this answer much more).
'performing' becomes 'on' (I've seen this in other clues).
'bar'+'on'='BARON'
'for' is the link.
Can you help me to learn more?
(Other definitions for baron that I've seen before include "A born nobleman" , "Lowest rank of British nobility" , "Nobleman providing a portion of beef" , "Title of rank" , "Powerful financier" .)