The most common and most likely answer to this crossword clue is the 6 letter word PITHOI
P
I
T
H
O
I
Buddy explains!
The straight part
We know that "jugs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jugs = pithoi.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 PITHOI mean?
PITHOI noun- A large ceramic jar used by certain ancient civilizations that bordered the Mediterranean.