No longer time: I state it’s the end (13)
I believe the answer is:
extermination
'the end' is the definition.
(to exterminate is to kill completely)
'no longer time i state' is the wordplay.
'no longer' becomes 'ex' (prefix meaning former or onetime).
'time i' becomes 'termi' (I can't explain this - if you can you should give a lot more credence to this answer).
'state' becomes 'nation' (both can mean a country).
'ex'+'termi'+'nation'='EXTERMINATION'
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for extermination that I've seen before include "Eradication" , "genocide" , "Abolishment" , "Execution" , "Killing of a whole group" .)