The most common and most likely answer to this crossword clue is the 9 letter word OBLATIONS
I've seen this crossword clue in The Daily Telegraph
O
B
L
A
T
I
O
N
S
Buddy explains!

The straight part
We know that "religious offerings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case religious offerings = oblations.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 OBLATIONS mean?
OBLATIONS noun- The offering of worship, thanks etc. to a deity.
- (by extension) A deed or gift offered charitably.