Mistakes encountered in Canberra talks (6)
I believe the answer is:
errata
'mistakes' is the definition.
(an erratum is a mistake in a printed work)
'encountered in canberra talks' is the wordplay.
'encountered in' says the answer is hidden in the clue.
'ERRATA' is hidden in the letters of 'canberra talks'.
(Other definitions for errata that I've seen before include "List of text corrections to be made in a publication" , "Mistakes in printed work" , "Printing corrections" , "Text mistakes" , "Mistakes in printing or writing" .)