The most common and most likely answer to this crossword clue is the 4 letter word GLUM
G
L
U
M
More clues leading to the result GLUM
- Litre in tankard to pick up and down
- Stick around lake, being down in the dumps
- Stick with left internally disheartened
- Blue left in stick
- Fifty boards to stick down
- Downhearted atomic company, American, kicked out of 9
- Gollum losing ring left sad
- Gollum losing ring alongside lake becoming sad.
- Fifty stick around, looking far from pleased
- Frodo’s rival loses ring, gets disheartened, becomes sad
Buddy explains!

The straight part
We know that "feeling low" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case feeling low = glum.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 GLUM mean?
GLUM adjective- Despondent; moody; sullen
- Sullenness
- To look sullen; to be of a sour countenance; to be glum.