Show man's broadcast (5)
I believe the answer is:
guise
'show' is the definition.
(thesaurus)
'man's broadcast' is the wordplay.
'man's' becomes 'guys' (guy is a kind of man).
'broadcast' shows a homophone (sound like) (how the word might sound on the radio or TV).
'guys' is a homophone of 'GUISE'.
(Other definitions for guise that I've seen before include "Appearance, semblance" , "Demeanour" , "Show" , "General appearance" , "Semblance; likeness" .)