The most common and most likely answer to this crossword clue is the 10 letter word DISPIRITED
I've seen this crossword clue in The Guardian
D
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Buddy explains!

The straight part
We know that "depressed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case depressed = dispirited.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 DISPIRITED mean?
DISPIRITED verb- To lower the morale of; to make despondent; to dishearten.
- Without energy, gusto or drive, enervated, without the will to accomplish, disheartened.