Change may be made later (5)
I believe the answer is:
alter
'change' is the definition.
(synonyms)
'made later' is the wordplay.
'made' indicates an anagram.
'later' anagrammed gives 'ALTER'.
'may be' is the link.
(Other definitions for alter that I've seen before include "shift" , "Change, maybe later" , "Vary" , "and 10 Across: Second self" , "convert" .)