The most common and most likely answer to this crossword clue is the 10 letter word VEGETABLES
I've seen this crossword clue in The Daily Telegraph
V
E
G
E
T
A
B
L
E
S
More clues leading to the result VEGETABLES
Buddy explains!
The straight part
We know that "Joint accompaniment?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case joint accompaniment? = vegetables.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 VEGETABLES mean?
VEGETABLES noun- Any plant.
- A plant raised for some edible part of it, such as the leaves, roots, fruit or flowers, but excluding any plant considered to be a fruit, grain, herb, or spice in the culinary sense.
- The edible part of such a plant.
- A person whose brain (or, infrequently, body) has been damaged so that they cannot interact with the surrounding environment; a person in a persistent vegetative state.