The most common and most likely answer to this crossword clue is the 4 letter word KNEE
I've seen this crossword clue in The Times
K
N
E
E
More clues leading to the result KNEE
- Competitive, the last to move up, one of two that could be capped
- Some stock needed for joint
- Joint head of kindergarten born in Paris
- King previously called for a joint
- Anxious to put name forward for bender
- Long hose: get it caught up in taps
- Joint seen kicking, partially pulled back
- Begging, one puts one’s cap on the floor?
- Stuck in mud maybe, need to have reflective look around
- Joint carried around by greenkeeper
Buddy explains!

The straight part
We know that "Stuck in mud maybe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stuck in mud maybe = knee.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 KNEE mean?
KNEE noun- In humans, the joint or the region of the joint in the middle part of the leg between the thigh and the shank.
- In the horse and allied animals, the carpal joint, corresponding to the wrist in humans.
- The part of a garment that covers the knee.
- A piece of timber or metal formed with an angle somewhat in the shape of the human knee when bent.
- An act of kneeling, especially to show respect or courtesy.
- Any knee-shaped item or sharp angle in a line; an inflection point.
- A blow made with the knee; a kneeing.
- To kneel to.
- To poke or strike with the knee.
- To move on the knees; to use the knees to move.