Crossword Genius

Sign of having stopped bleeding (4)

Ross

I believe the answer is:

scar

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'sign' is the definition.
(I have seen 'Sign of injury ' mean 'scar' so perhaps 'sign' could also mean 'scar')

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for scar that I've seen before include "Old wound - bare cliff" , "Sign of old injury" , "Mark of old injury" , "reef" , "Evidence of an old injury" .)

I've seen this clue in the Evening Standard.
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