To ease burden, consider having change of leader (7)
I believe the answer is:
relieve
'to ease' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for relieve that I've seen before include "Assuage - take over duty from" , "Free from obligation" , "Take a job over from - bring aid" , "Break the sameness of" , "Comfort" .)