The most common and most likely answer to this crossword clue is the 5 letter word SELAH
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The straight part
We know that "Pause in psalms" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pause in psalms = selah.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 SELAH mean?
SELAH noun- A pause or rest of a contemplative nature.
- A word occurring between verses or paragraphs in parts of the Hebrew Bible, namely in Habakkuk and the Psalms; perhaps indicating a pause, either for contemplation or for the singer to clear his or her throat.