Sacred bird of ancient Egypt (4)
I believe the answer is:
ibis
'sacred bird of ancient egypt' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ibis that I've seen before include "Wader worshipped by ancient Egyptians" , "Slowly discharge" , "leggy bird" , "Wading bird of tropical waters" , "seaside feeder?" .)