TV station expels new fashion designer (6)
I believe the answer is:
chanel
'fashion designer' is the definition.
(Coco Chanel)
'tv station expels new' is the wordplay.
'tv station' becomes 'channel' (I've seen this before).
'expels' is a deletion indicator.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'channel' with 'n' taken out is 'CHANEL'.
(Other definitions for chanel that I've seen before include "Coco -, Fr. designer" , "French fashion designer and perfumier, d. 1971" , "Scent company" , "See 1" , "Coco --, French fashion designer" .)