Humble a good person, after a fashion (6)
I believe the answer is:
modest
'humble' is the definition.
(synonyms)
'a good person after a fashion' is the wordplay.
'a good person' becomes 'st' (saint).
'after' says to put letters next to each other.
'a fashion' becomes 'mode' ('mode' can be a synonym of 'fashion').
'st' after 'mode' is 'MODEST'.
(Other definitions for modest that I've seen before include "Free from pomp or affectation" , "Lacking vanity" , "Not excessive in rating one's own achievements" , "Unassuming; small" , "'Unassuming, diffident (6)'" .)