Not silent, as broadcast permitted (5)
I believe the answer is:
aloud
'not silent' is the definition.
I can't judge whether this definition defines the answer.
'broadcast permitted' is the wordplay.
'broadcast' indicates a 'sounds like' (homophone) clue (how the word might sound on the radio or TV).
'permitted' becomes 'allowed' ('allow' can be a synonym of 'permit').
'allowed' sounds like 'ALOUD'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for aloud that I've seen before include "intended for audience" , "So as to be heard" , "Not under breath" , "Audibly" , "For all to hear" .)