The most common and most likely answer to this crossword clue is the 6 letter word SWILLS
I've seen this crossword clue in The Guardian
S
W
I
L
L
S
Buddy explains!

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 SWILLS mean?
SWILLS noun- (collective) A mixture of solid and liquid food scraps fed to pigs etc; especially kitchen waste for this purpose.
- (by extension) Any disgusting or distasteful liquid.
- (by extension) Anything disgusting or worthless.
- A large quantity of liquid drunk at one swallow.
- Inexpensive beer or alcohol.
- (Ultimate Frisbee) A badly-thrown pass.