Broadcast at border, in area only accessible with permission (7)
I believe the answer is:
airside
'area only accessible with permission' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'broadcast at border' is the wordplay.
'broadcast' becomes 'air' (to air on TV).
'at' says to put letters next to each other.
'border' becomes 'side' (a border is the side of something).
'air'+'side'='AIRSIDE'
'in' is the link.
Can you help me to learn more?
(Other definitions for airside that I've seen before include "area of Heathrow?" , "Through passport control" .)