May it change into cordiality (5)
I believe the answer is:
amity
'cordiality' is the definition.
(synonyms)
'may it change' is the wordplay.
'change' indicates anagramming the letters.
'may'+'it'='mayit'
'mayit' with letters rearranged gives 'AMITY'.
'into' acts as a link.
(Other definitions for amity that I've seen before include "Cordiality" , "Friendly feeling, fraternity" , "Accord" , "Fellowship" , "Cordial friendship" .)