A vice tallied (6)
I believe the answer is:
agreed
'tallied' is the definition.
(agreeing is a kind of tallying)
'a vice' is the wordplay.
'vice' becomes 'greed' (I've seen this before).
'a'+'greed'='AGREED'
(Other definitions for agreed that I've seen before include "Harmonised" , "That's right" , "very well" , "Said yes" , "OK, fine!" .)