Bury meeting said to be for mediation (12)
I believe the answer is:
intercession
'be for mediation' is the definition.
(thesaurus)
'bury meeting said' is the wordplay.
'bury' becomes 'inter' (I've seen this before).
'meeting' means one lot of letters go next to another.
'said' becomes 'cession' (I am not sure about this - if you are sure you should believe this answer much more).
'inter'+'cession'='INTERCESSION'
'to' is the link.
Can you help me to learn more?
(Other definitions for intercession that I've seen before include "Plea for another" , "Form of prayer ..." , "Prayer in which there's asking" , "Act of pleading on behalf of another" , "Saying of a prayer on another's behalf" .)