Common sense about the right legal document (4)
I believe the answer is:
writ
'legal document' is the definition.
(I know that writ is a type of legal document)
'common sense about the right' is the wordplay.
'common sense' becomes 'wit' (I have seen 'Good sense' mean 'wit' so perhaps 'sense' could also mean 'wit'. I am not sure about the 'common' bit.).
'about' is an insertion indicator.
'the right' becomes 'r' (abbreviation).
'wit' going around 'r' is 'WRIT'.
Can you help me to learn more?
(Other definitions for writ that I've seen before include "Legal document issued by judicial officer" , "court paper" , "Veteran composed" , "Legal document of command" , "Court order document" .)