Take over from (7)
I believe the answer is:
relieve
'take over from' is the definition.
(synonyms)
This is all the clue.
(Other definitions for relieve that I've seen before include "Assuage, ease" , "Allay, alleviate" , "Make less tedious, bring aid to (besieged place)" , "Free someone from duty by taking his place" , "Set free" .)