Famous pharaoh (3)
I believe the answer is:
tut
'famous pharaoh' is the definition.
(short for Tutankhamun)
This is the entire clue.
(Other definitions for tut that I've seen before include "Exclamation of disapproval or annoyance" , "That's bad!" , "Disapproving noise" , "former ruler, in brief" , "Sound disapproving" .)