Egyptian symbol of life (4)
I believe the answer is:
ankh
'egyptian symbol of life' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ankh that I've seen before include "Hank (anag) - cross symbolising eternal life" , "Ansate cross" , "Waylay" , "Sign of life" , "Egyptian hieroglyph representing life" .)