The most common and most likely answer to this crossword clue is the 5 letter word CANON
I've seen this crossword clue in The Times
C
A
N
O
N
More clues leading to the result CANON
- Clergyman shot in billiard hall, we hear
- Conservative soon to become ordained minister
- Chapter by prolific author in body of literature
- Law of Swiss state banning introduction of tariffs
- Law works
- A clergyman and all his works?
- List of works including chapter by prolific author, perhaps
- Charlie meets unknown cleric
- One is found in chapter, as a rule
- Chapter by unknown writer, or part of one
Buddy explains!

The straight part
We know that "A clergyman/and all his works?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a clergyman/and all his works? = canon.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CANON mean?
CANON noun- A generally accepted principle; a rule.
- A group of literary works that are generally accepted as representing a field.
- The works of a writer that have been accepted as authentic.
- A eucharistic prayer, particularly the Roman Canon.
- A religious law or body of law decreed by the church.
- A catalogue of saints acknowledged and canonized in the Roman Catholic Church.
- In monasteries, a book containing the rules of a religious order.
- A member of a cathedral chapter; one who possesses a prebend in a cathedral or collegiate church.
- A piece of music in which the same melody is played by different voices, but beginning at different times; a round.
- (Roman law) A rent or stipend payable at some regular time, generally annual, e.g., canon frumentarius
- Those sources, especially including literary works, which are considered part of the main continuity regarding a given fictional universe.
- A rolled and filleted loin of meat; also called cannon.
- A large size of type formerly used for printing the church canons, standardized as 48-point.
- The part of a bell by which it is suspended; the ear or shank of a bell.
- A carom.
- A clergy member serving a cathedral or collegiate church.
- A canon regular, a member of any of several Roman Catholic religious orders.
- A Near Eastern and Caucasian musical instrument related to the zither, dulcimer, or harp having either 26 strings and a single bridge, or twice that number and two bridges.