In broadcast satirise aggressive winger (4)
I believe the answer is:
skua
'winger' is the definition.
(skua is a kind of bird)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for skua that I've seen before include "One preying on gulls" , "Flyer" , "Craziness" , "Arctic seabird" , "Large sea bird" .)