After victory, awfully sober and talkative (7)
I believe the answer is:
verbose
'talkative' is the definition.
(I've seen this in another clue)
'after victory awfully sober' is the wordplay.
'after' says to put letters next to each other.
'victory' becomes 'VE' (VE is short for Victory in Europe).
'awfully' is an anagram indicator.
'sober' with letters rearranged gives 'rbose'.
've' put next to 'rbose' is 'VERBOSE'.
'and' acts as a link.
(Other definitions for verbose that I've seen before include "With an excess of words" , "Boringly long-winded" , "'Long-winded, wordy (7)'" , "Using more words than necessary" , "Using or containing too many words" .)