Bit of peace called for? (5)
I believe the answer is:
piece
'bit of' is the definition.
(I've seen this before)
'peace called for?' is the wordplay.
'called for?' indicates a 'sounds like' (homophone) clue.
'peace' sounds like 'PIECE'.
(Other definitions for piece that I've seen before include "Chessman - part - firearm" , "artefact" , "One part of a whole" , "knight, perhaps" , "Scrap - musical work" .)