African city tribe in broadcast (6)
I believe the answer is:
agadir
'african city' is the definition.
(I've seen this before)
'tribe in broadcast' is the wordplay.
'tribe' becomes 'gad' (I've seen this before).
'in' indicates putting letters inside.
'broadcast' becomes 'air' (to air on TV).
'gad' going into 'air' is 'AGADIR'.
(Other definitions for agadir that I've seen before include "North African port" , "City in Morocco" , "in Africa" , "Moroccan seaport" , "Port in south-west Morocco" .)