The most common and most likely answer to this crossword clue is the 8 letter word MADONNAS
I've seen this crossword clue in The Times
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More clues leading to the result MADONNAS
Buddy explains!

The straight part
We know that "some religious paintings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case some religious paintings = madonnas.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 MADONNAS mean?
MADONNAS noun- A one-footed lien-to-tail trick, where the front foot is taken off and kicked out straight down behind the board.