Unicode sure to break eventually (2,3,6)
I believe the answer is:
in due course
'eventually' is the definition.
(I've seen this before)
'unicode sure to break' is the wordplay.
'to break' indicates anagramming the letters.
'unicode'+'sure'='unicodesure'
'unicodesure' is an anagram of 'IN DUE COURSE'.
(Other definitions for in due course that I've seen before include "When the time comes" , "in the natural order" , "at the proper time" , "Eventually" , "At the appropriate time" .)