Company about to broadcast in capital (5)
I believe the answer is:
cairo
'capital' is the definition.
(Cairo is an example)
'company about to broadcast' is the wordplay.
'company' becomes 'co' (abbreviation**).
'about' means one lot of letters goes inside another.
'to broadcast' becomes 'air' ('air' can be a synonym of 'broadcast').
'co' placed around 'air' is 'CAIRO'.
'in' is the link.
(Other definitions for cairo that I've seen before include "North African capital" , "Egypt's capital" , "Egyptian capital" , "Al Qahira" , "African city" .)