Goes ape in broadcast revealing covert activity (9)
I believe the answer is:
espionage
'covert activity' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'goes ape in broadcast' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'goes'+'ape'+'in'='goesapein'
'goesapein' is an anagram of 'ESPIONAGE'.
'revealing' is the link.
Can you help me to learn more?
(Other definitions for espionage that I've seen before include "intelligence" , "undercover work" , "agent's job" , "seeking information" , "Practice of spying" .)