Queen, King in palace to broadcast (9)
I believe the answer is:
cleopatra
'queen' is the definition.
(Cleopatra is an example)
'king in palace to broadcast' is the wordplay.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'in' means one lot of letters goes inside another.
'broadcast' indicates an anagram (letters scattered or cast around).
'palace'+'to'='palaceto'
'palaceto' anagrammed gives 'cleopata'.
'r' inserted inside 'cleopata' is 'CLEOPATRA'.
(Other definitions for cleopatra that I've seen before include "ruler" , "beauty of old" , "tragic role" , "Heroine" , "Queen of the South" .)