Sorrow about all those dots and dashes (7)
I believe the answer is:
remorse
'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" .)