A good man and a sound cook (5)
I believe the answer is:
Here is my best explanation:
'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'm not sure about the 'a good' bit.
I don't understand how the rest of the clue works.
(Other definitions for friar that I've seen before include "..... Tuck was one of Robin Hood's men", "Mendicant monk", "Male member of a mendicant religious order", "Mendicant preacher", "This monk", "Religious mendicant", "he offers religious teaching?", "Eg, a Franciscan", "Man connected with order" and "Religious order member".)