Crossword Genius

Sorrow about all those dots and dashes (7)

Ross

I believe the answer is:

remorse

I'm a little stuck... Click here to teach me more about this clue!

'sorrow' is the definition.
(I know that remorse is a type of sorrow)

'about all those dots and dashes' is the wordplay.
I cannot really understand how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is present in the answer.
The remaining letters 'morse' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for remorse that I've seen before include "regrets" , "Sorrow for sin or wrong-doing" , "compassion" , "Bitter regret" , "Regret or sorrow for wrong-doing" .)

I've seen this clue in the Evening Standard.
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