The most common and most likely answer to this crossword clue is the 9 letter word ESTIMABLE
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result ESTIMABLE
- Employed by European firm, this person's highly rated
- Unreliable timetable’s omitting time: that’s … worthy of note
- Worthy is in the Louvre with profession of craft?
- Valued times possibly lecturer had in Lincoln
- English taking steps to limit recurrence of hoax? That’s worthwhile
- Worthy bridge opponents — I’m invited into their play area
- Deserving of an accolade, fantastic Beatles — this person’s getting enthralled
- Best meal cooked around island worthy of praise
- Is the French one a girl’s name worthy of respect?
- Unreliable timetable's omitting time: that's ... worthy of note
Buddy explains!

The straight part
We know that "worthy of praise" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case worthy of praise = estimable.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 ESTIMABLE mean?
ESTIMABLE adjective- Worthy of esteem; admirable.
- Valuable.
- Capable of being estimated; estimatable.