Only half like stuffed, roast meat - it's a religious thing, maybe (6)
I believe the answer is:
belief
'meat it's a religious thing maybe' is the definition.
I can't tell whether this defines the answer.
'only half like stuffed roast' is the wordplay.
'only half' indicates taking half.
'stuffed' means one lot of letters goes inside another.
'roast' becomes 'beef' (beef roast is a kind of roast).
'like' cut in half is 'li'.
'li' inserted inside 'beef' is 'BELIEF'.
Can you help me to learn more?
(Other definitions for belief that I've seen before include "Credo" , "Tenet, creed" , "Persuasion" , "Faith, doctrine" , "Firm conviction" .)