Forced rebel leader to be accepted by peacemaker (5)
I believe the answer is:
drove
'forced' is the definition.
(I've seen this before)
'rebel leader to be accepted by peacemaker' is the wordplay.
'rebel leader' becomes 'r' (I've seen this in other clues).
'to be accepted by' means one lot of letters goes inside another.
'peacemaker' becomes 'dove' (I've seen this before).
'r' going inside 'dove' is 'DROVE'.
(Other definitions for drove that I've seen before include "kicked hard" , "Number of cattle" , "Took car; herd animals" , "acted like Mr Toad" , "Motivated" .)