The most common and most likely answer to this crossword clue is the 6 letter word GUMMED
I've seen this crossword clue in The Daily Telegraph
G
U
M
M
E
D
More clues leading to the result GUMMED
Buddy explains!
The straight part
We know that "stuck" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stuck = gummed.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 GUMMED mean?
GUMMED verb- To chew, especially of a toothless person or animal.
- To deepen and enlarge the spaces between the teeth of (a worn saw), as with a gummer.
- (sometimes with up) To apply an adhesive or gum to; to make sticky by applying a sticky substance to.
- To stiffen with glue or gum.
- (sometimes with together) To inelegantly attach into a sequence.
- (with up) To impair the functioning of a thing or process.