Lawyers' conference, where additional information might be provided (7)
I believe the answer is:
sidebar
'conference where additional information might be provided' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'lawyers'' is the wordplay.
I cannot quite see how this works, but
'lawyers'' could be 'bar' (the bar can mean the legal profession) and 'bar' is located in the answer.
The remaining letters 'side' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sidebar that I've seen before include "Courtroom conference between the lawyers and the judge" , "South African solicitors" , "Short item throwing light on the main article - braised (anag)" , "Explanatory panel" .)