Boycotts sick-looking film about ballet (5,4)
I believe the answer is:
black swan
'film about ballet' is the definition.
(2010 Thriller starring Natalie Portman)
'boycotts sick-looking' is the wordplay.
'boycotts' becomes 'blacks' (black lists).
'sick-looking' becomes 'wan' (I've seen this in another clue).
'blacks'+'wan'='BLACK SWAN'
(Other definitions for black swan that I've seen before include "Aquatic bird" , "Australian native bird" , "Aussie swimmer" , "Australian winger" .)