The most common and most likely answer to this crossword clue is the 3 letter word SAD
S
A
D
More clues leading to the result SAD
- Said when one leaves in low spirits
- Blue almost all absent from greens
- Small bill is miserable
- Blue fish not caught
- A daughter overlooked by son is out of sorts
- Polish knight has gone blue
- Unhappy workers finally given notice
- Down south in these times
- Complaint letters periodically dispatched from island
- The German up and down
Buddy explains!

The straight part
We know that "Down" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case down = sad.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 SAD mean?
SAD verb- To make melancholy; to sadden or grieve (someone).
- (heading) Emotionally negative.
- Sated, having had one's fill; satisfied, weary.
- Steadfast, valiant.
- Dignified, serious, grave.
- Naughty; troublesome; wicked.
- Unfashionable; socially inadequate or undesirable.
- Soggy (to refer to pastries).
- Heavy; weighty; ponderous; close; hard.
- The letter ص in the Arabic script.