Change shape later (5)
I believe the answer is:
alter
'change' is the definition.
(I know that change can be written as alter)
'shape later' is the wordplay.
'shape' is an anagram indicator.
'later' anagrammed gives 'ALTER'.
(Other definitions for alter that I've seen before include "Make changes to" , "Amend" , "shift" , "Bout of extravagant spending" , "Change, maybe later" .)