Lawyer, opening argument, hits the right mark (4)

I believe the answer is:

scar

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'mark' is the definition.
(mark left by an injury)

'lawyer opening argument hits the right' is the wordplay.
'lawyer' becomes 'sc' (I can't explain this - if you can you should give a lot more credence to this answer).
'opening' suggests taking the first letters.
'hits' says to put letters next to each other (some letters hit or touch others).
'the right' becomes 'r' (common abbreviation).
The first letter of 'argument' is 'a'.
'sc'+'a'+'r'='SCAR'

Can you help me to learn more?

(Other definitions for scar that I've seen before include "Remnant of wound" , "Injury mark - cliff" , "Mark from a wound left on the skin" , "Mark of old injury" , "Craggy rock formation" .)

I've seen this clue in The Irish Times.

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