Weapon taken from ceasefire, reportedly (5)
I believe the answer is:
piece
'weapon' is the definition.
(piece is a kind of weapon)
'ceasefire reportedly' is the wordplay.
'ceasefire' becomes 'peace'.
'reportedly' indicates a 'sounds like' (homophone) clue.
'peace' sounds like 'PIECE'.
'taken from' is the link.
(Other definitions for piece that I've seen before include "Firearm -- collector's item" , "Portion; musical work" , "Musical work; bit" , "Unpleasant character" , "one of eight once ready for the Spanish?" .)