Piece following broadcast by pilot (6)
I believe the answer is:
airman
'pilot' is the definition.
(thesaurus)
'piece following broadcast' is the wordplay.
'piece' becomes 'man' ('man' can be a synonym of 'piece'**).
'following' says to put letters next to each other.
'broadcast' becomes 'air' ('air' can be a synonym of 'broadcast').
'man' put after 'air' is 'AIRMAN'.
'by' acts as a link.
(Other definitions for airman that I've seen before include "He flies" , "Aviator" , "crew member" , "Male flyer" , "Pilot" .)