Remains the highest among saints (5)
I believe the answer is:
stops
'remains' is the definition.
The answer and definition can be both related to change as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?
'the highest among saints' is the wordplay.
'the highest' becomes 'top' (I've seen this before).
'among' means one lot of letters goes inside another.
'saints' becomes 'ss'.
'top' inserted inside 'ss' is 'STOPS'.
Can you help me to learn more?
(Other definitions for stops that I've seen before include "Ceases" , "Prevents" , "Ends" , "Posts (anag.)" , "Checks" .)