The most common and most likely answer to this crossword clue is the 10 letter word COMPLIMENT
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The straight part
We know that "praise" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case praise = compliment.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 COMPLIMENT mean?
COMPLIMENT noun- An expression of praise, congratulation, or respect.
- Complimentary language; courtesy, flattery.
- To pay a compliment (to); to express a favorable opinion (of).