Utter 'No more!' (4)
I believe the answer is:
dead
I believe this is a double definition.
'utter' is the first definition.
(eg dead silence is utter silence)
'no more' is the second definition.
(if someone is no more they are dead)
(Other definitions for dead that I've seen before include "Not quick" , "Passed on" , "Insensitive" , "No longer alive" , "Pushing up the daisies" .)