Cicatrix (4)
I believe the answer is:
scar
'cicatrix' is the definition.
(I know that cicatrix can be written as scar)
This is all the clue.
(Other definitions for scar that I've seen before include "Craggy rock formation" , "Old wound - bare cliff" , "Mark on body or tree" , "Limestone cliff or outcrop" , "Identifying mark" .)