The most common and most likely answer to this crossword clue is the 7 letter word MORTARS
M
O
R
T
A
R
S
Buddy explains!
The straight part
We know that "vessels" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vessels = mortars.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 MORTARS mean?
MORTARS noun- A mixture of lime or cement, sand and water used for bonding building blocks.
- A muzzle-loading, indirect fire weapon with a tube length of 10 to 20 calibers and designed to lob shells at very steep trajectories.
- A hollow vessel used to pound, crush, rub, grind or mix ingredients with a pestle.
- To use mortar or plaster to join two things together.
- To pound in a mortar.
- To fire a mortar (weapon).