Traumatise (4)
I believe the answer is:
scar
'traumatise' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scar that I've seen before include "Craggy rock formation" , "Evidence of an old injury" , "Long (for)" , "nine [AL CAPONE] had to face" , "Mark on body or tree" .)