She can broadcast about idiot Englishman (9)
I believe the answer is:
sassenach
'englishman' is the definition.
(Sassenach is an example)
'she can broadcast about idiot' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'about' means one lot of letters goes inside another.
'idiot' becomes 'ass' (I've seen this in another clue).
'she'+'can'='shecan'
'shecan' is an anagram of 'senach'.
'senach' placed around 'ass' is 'SASSENACH'.
(Other definitions for sassenach that I've seen before include "Englishman in Scotland" , "Englishman, Lowlander" , "Uncomplimentary Scots term for an Englishman" , "who comes from England?" , "In Scotland, English" .)