John known as "The Father of Television" (5)
I believe the answer is:
baird
'john known as the father of television' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for baird that I've seen before include "John Logie - -" , "He devised television" , "Scottish inventor" , "Television pioneer" , "inventive man" .)