Broadcasting a primarily Indian band (6)
I believe the answer is:
airing
'broadcasting' is the definition.
('air' can be a synonym of 'broadcast')
'a primarily indian band' is the wordplay.
'primarily' suggests taking the first letters.
'band' becomes 'ring' (ring is a kind of band).
The first letter of 'indian' is 'i'.
'a'+'i'+'ring'='AIRING'
(Other definitions for airing that I've seen before include "Expressing (an opinion) publicly" , "Ventilation" , "Showing" , "Exposure" , "Publicity" .)