Rule to stop rising in court after barrister’s closing bit (4,3)
I believe the answer is:
riot act
'rule' is the definition.
(Riot Act is an example)
'court after barrister's closing bit' is the wordplay.
'court' becomes 'ct' (abbreviation used in road names).
'after' is a charade indicator (letters next to each other).
'closing' says to take the final letters (the letter which ends or closes the word).
'bit' becomes 'iota' (I have seen 'Tiny bit' mean 'iota' so perhaps 'bit' could also mean 'iota').
The final letter of 'barrister' is 'r'.
'r'+'iota'='riota'
'ct' after 'riota' is 'RIOT ACT'.
'to stop rising in' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for riot act that I've seen before include "used to deal with unrest" , "Old law designed to disperse a mob" , "legislation delivered to the mob" , "something read to little devils?" , "It's read in the face of disturbances" .)