A good man and a sound cook (5)
I believe the answer is:
friar
'a good man' is the definition.
'friar' can be an answer for 'man' (I have seen 'Religious man ' mean 'friar' so perhaps 'man' could also mean 'friar'). I am not certain of the 'a good' bit.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for friar that I've seen before include "Male member of a mendicant religious order" , "he offers religious teaching?" , "Mendicant priest" , "Religious man" , "Monk perhaps" .)