Military bigshots reportedly prohibited a music group (5,4)
I believe the answer is:
brass band
'music group' is the definition.
(I know that brass band is a type of band)
'military bigshots reportedly prohibited a' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for brass band that I've seen before include "Group with trumpets etc" , "on hand at cheap wedding?" , "Group of musicians, maybe military" , "cheap alternative to gold ring" , "Oompah ensemble?" .)