Unconventional protagonist cursed on the air (8)
I believe the answer is:
antihero
'unconventional protagonist' is the definition.
'antihero' can be an answer for 'protagonist' (antihero is a kind of protagonist). I am not certain of the 'unconventional' bit.
'cursed on the air' is the wordplay.
'cursed' is an anagram indicator (a damaged or cursed form of the letters).
'on'+'the'+'air'='ontheair'
'ontheair' is an anagram of 'ANTIHERO'.
Can you help me to learn more?
(Other definitions for antihero that I've seen before include "principal character lacking noble qualities" , "Protagonist without admirable qualities" , "Unconventional principal character" , "central character, say" , "Central character lacking traditional courageous attributes" .)