Where a control tower might be in broadcast range (8)
I believe the answer is:
airfield
'where a control tower might be' is the definition.
'broadcast range' is the wordplay.
'broadcast' becomes 'air' ('air' can be a synonym of 'broadcast').
'range' becomes 'field'.
'air'+'field'='AIRFIELD'
'in' acts as a link.
(Other definitions for airfield that I've seen before include "Aniseed aperitif" , "Flying base" , "Landing/take-off area" , "Landing ground" , "Strip for planes" .)