Old fashioned writing style of lawyer sending final letters to leader (6)
I believe the answer is:
script
'leader' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'old fashioned writing style of lawyer sending final letters' is the wordplay.
I cannot really see how this works, but
'writing' could be 'scrip' (scrip is a kind of writing) and 'scrip' is present in the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for script that I've seen before include "Text, of a play say" , "Piece of handwriting" , "Written version of a play" , "Calligraphy" , "Form of text" .)