Moral project involving saint (4)
I believe the answer is:
just
'moral' is the definition.
(synonyms)
'project involving saint' is the wordplay.
'project' becomes 'jut' (project can mean to jut out).
'involving' indicates putting letters inside.
'saint' becomes 's'.
'jut' going around 's' is 'JUST'.
(Other definitions for just that I've seen before include "Exactly" , "Recently" , "Barely honest?" , "Merely - fair" , "Barely; right and fair" .)