The most common and most likely answer to this crossword clue is the 7 letter word THERMOS
I've seen this crossword clue in The Daily Telegraph
T
H
E
R
M
O
S
More clues leading to the result THERMOS
- Flask discovered in either mosque
- Flask in French tea service thus turned over
- Minute drops in parent’s drinks container
- Bottle shown by jollies thus in retreat
- Mother lost small flask
- Other people crossing river really capsized vessel
- The Royal Marines heading lowly sailor’s vessel
- Measurements of heat with nothing in container
- It doesn’t normally contain mother’s ruin
- Article put on jolly huge drinks container
Buddy explains!
The straight part
We know that "vessel" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vessel = thermos.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 THERMOS mean?
THERMOS noun- A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents