It's correct to admit charismatic leader brought about ceasefire (5)
I believe the answer is:
truce
'ceasefire' is the definition.
(both can mean a break in fighting)
'it's correct to admit charismatic leader' is the wordplay.
'it's correct' becomes 'true' (associated in meaning).
'to admit' indicates putting letters inside.
'leader' says to take the initial letters.
The initial letter of 'charismatic' is 'c'.
'true' enclosing 'c' is 'TRUCE'.
'brought about' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for truce that I've seen before include "peace initiative" , "Cease-fire, armistice" , "Temporary ceasefire" , "Cuter (anag.)" , "conciliatory agreement" .)