Got up to change the reins (5)
I believe the answer is:
risen
'got up' is the definition.
('rise' can be a synonym of 'get up')
'change the reins' is the wordplay.
'change' indicates an anagram.
'reins' with letters rearranged gives 'RISEN'.
'to' is the link.
(Other definitions for risen that I've seen before include "Out of bed" , "Sprung up" , "Ascended - revolted" , "mounted a rebellion" , "Grown up" .)