Be up in time for talk (6)
I believe the answer is:
debate
'for talk' is the definition.
(I've seen this before)
'be up in time' is the wordplay.
'up' indicates anagramming the letters (letters get chucked up).
'in' is an insertion indicator.
'time' becomes 'date' (date is a kind of time).
'be' anagrammed gives 'eb'.
'eb' put into 'date' is 'DEBATE'.
(Other definitions for debate that I've seen before include "Discuss formally" , "Talk" , "Discuss (in parliament)" , "Discuss through argument" , "Discuss; argue" .)