Science educator Bill (3)
I believe the answer is:
nye
'science educator bill' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nye that I've seen before include "- - Bevan (politics)" , "-- Bevan, NHS founder" , "- - Bevan (NHS pioneer)" , "Pheasant's nest" , "Flock of pheasants" .)