____ O'Donnell of TV (5)
I believe the answer is:
rosie
'o'donnell of tv' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rosie that I've seen before include "Char" , "Old song: 'Sweet ..... O'Grady'" , "lady" , "-- Lee is slang for tea" , "Girl's name" .)