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' indicates a hidden word.
'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" .)