The most common and most likely answer to this crossword clue is the 6 letter word CHAPEL
I've seen this crossword clue in The Times
C
H
A
P
E
L
More clues leading to the result CHAPEL
- Oratory in the case of Churchill hard to copy
- Church to copy Lutyens’ façade in religious building
- Place of worship built cheap - a pound
- Fellow starts to exclaim loudly in place of worship
- Tea ladies initially accept leaders of Private Eye
- Red line covers a page in centre of worship
- Place with entrance to hallowed ground
- Man gets the Castilian into place of worship
- Church course Ann quits when dad goes back in
- Husband put in place, wandering in religious venue
Buddy explains!

The straight part
We know that "religious building" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case religious building = chapel.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 CHAPEL mean?
CHAPEL noun- A place of worship, smaller than or subordinate to a church.
- A place of worship in another building or within a civil institution such as a larger church, airport, prison, monastery, school, etc.; often primarily for private prayer.
- A funeral home, or a room in one for holding funeral services.
- A trade union branch in printing or journalism.
- A printing office.
- A choir of singers, or an orchestra, attached to the court of a prince or nobleman.
- To cause (a ship taken aback in a light breeze) to turn or make a circuit so as to recover, without bracing the yards, the same tack on which she had been sailing.
- To deposit or inter in a chapel; to enshrine.
- Describing a person who attends a nonconformist chapel.