The most common and most likely answer to this crossword clue is the 8 letter word LAUDABLE
I've seen this crossword clue in The Daily Telegraph
L
A
U
D
A
B
L
E
Buddy explains!

The straight part
We know that "Worthy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case worthy = laudable.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 LAUDABLE mean?
LAUDABLE adjective- Worthy of being lauded; praiseworthy; commendable
- Healthy; salubrious; having a disposition to promote healing