Most up-to-the-minute (6)
I believe the answer is:
latest
'most up-to-the-minute' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for latest that I've seen before include "delayed more than all others" , "Up-to-the-minute" , "Most recent or most unpunctual" , "style of today" , "Most up to the minute" .)