Good man consumed little dessert (5)
I believe the answer is:
sweet
'dessert' is the definition.
(synonyms)
'good man consumed little' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'consumed' is an insertion indicator.
'little' becomes 'wee' (similar in meaning).
'st' placed around 'wee' is 'SWEET'.
(Other definitions for sweet that I've seen before include "winning" , "Amiable" , "Confection" , "Melodious, not bitter" , "Ewes cycle it (anag) -- herb (myrrh)" .)