Deity’s sound is broadcast around yard (8)
I believe the answer is:
dionysus
'deity's' is the definition.
(Dionysus is an example)
'sound is broadcast around yard' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'around' means one lot of letters goes inside another.
'yard' becomes 'y' (abbreviation).
'sound'+'is'='soundis'
'soundis' with letters rearranged gives 'dionsus'.
'dionsus' placed around 'y' is 'DIONYSUS'.
(Other definitions for dionysus that I've seen before include "Greek god of wine and fertility, also known as Bacchus" , "Sins you'd associate with Greek god of wine and fertility" , "Greek god of wine and good times" , "Greek god of wine and creativity" , "Wine-god" .)