Conservative diplomacy in meeting (7)
I believe the answer is:
contact
'meeting' is the definition.
(contact is a kind of meeting)
'conservative diplomacy' is the wordplay.
'conservative' becomes 'con' (I've seen this in other clues).
'diplomacy' becomes 'tact' (I've seen this before).
'con'+'tact'='CONTACT'
'in' is the link.
(Other definitions for contact that I've seen before include "Maybe page" , "Touch - electrical point" , "Meeting" , "Useful acquaintance" , "Get in touch with" .)