Watch me talk about peace after it's over (9)
I believe the answer is:
timepiece
'watch' is the definition.
(I've seen this before)
'me talk about peace after it's over' is the wordplay.
'talk about' indicates a 'sounds like' (homophone) clue (I've seen 'talked about' mean this).
'after' means one lot of letters go next to another.
'over' is a reversal indicator.
'peace' is a homophone of 'piece'.
'it' back-to-front is 'ti'.
'me'+'piece'='mepiece'
'mepiece' put after 'ti' is 'TIMEPIECE'.
(Other definitions for timepiece that I've seen before include "Maybe watch" , "Maybe hunter" , "Eg, watch or clock" , "Chronometer" , "Watch, say" .)