The most common and most likely answer to this crossword clue is the 9 letter word DEDICATED
I've seen this crossword clue in Independent
D
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D
More clues leading to the result DEDICATED
- Single-minded and certain to hold volunteers back
- Showing commitment, as some books may be
- Devoted daughter polished, maybe, harnesses roughly
- Hard-working lower classes ordered to waste time
- Stalwart inspector with Jaguar perhaps in action
- Devoted daughter out of head on drugs
- Devoted doctor died before animal given drug departed
- Set aside for being hopelessly ecstasy-addicted
- Diligent cadet died after training
- Committed and old-fashioned about playing dice
Buddy explains!

The straight part
We know that "Devoted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case devoted = dedicated.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 DEDICATED mean?
DEDICATED verb- To set apart for a deity or for religious purposes; consecrate.
- To set apart for a special use
- To commit (oneself) to a particular course of thought or action
- To address or inscribe (a literary work, for example) to another as a mark of respect or affection.
- To open (a building, for example) to public use.
- To show to the public for the first time
- Devoted; loyal; conscientious.
- Used or intended for a particular purpose