Huge bird I can broadcast (7)
I believe the answer is:
titanic
'huge' is the definition.
(I've seen this before)
'bird i can broadcast' is the wordplay.
'bird' becomes 'tit' (tit is a kind of bird).
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'i'+'can'='ican'
'ican' is an anagram of 'anic'.
'tit'+'anic'='TITANIC'
(Other definitions for titanic that I've seen before include "Of enormous size, like the stricken liner" , "Of exceptional strength or size" , "Of exceptional size or power" , "Having huge strength - ship that famously sunk" , "Twenty one [SHIP]" .)