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