The most common and most likely answer to this crossword clue is the 2 plus 7 letter word IN SERVICE
I've seen this crossword clue in The Daily Telegraph
I
N
S
E
R
V
I
C
E
More clues leading to the result IN SERVICE
Buddy explains!
The straight part
We know that "Available for use/during religious ceremony" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case available for use/during religious ceremony = in service.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 IN SERVICE mean?
IN SERVICE verb- To train or educate (someone) while they are working; to give on-the-job training to.
- (of training etc.) Taking place when one is an employee.
- Relating to or being a full-time employee.