Bury opinion shown in discussion (9)
I believe the answer is:
interview
'discussion' is the definition.
(I know that interview is a type of conference)
'bury opinion' is the wordplay.
'bury' becomes 'inter' (to inter is to put into the ground).
'opinion' becomes 'view' (synonyms).
'inter'+'view'='INTERVIEW'
'shown in' is the link.
(Other definitions for interview that I've seen before include "job talk" , "to ask questions" , "Assessment of applicant - discussion" , "format for talk show" , "Formal discussion with job seeker" .)