The most common and most likely answer to this crossword clue is the 7 letter word HOGWASH
I've seen this crossword clue in The Guardian
H
O
G
W
A
S
H
More clues leading to the result HOGWASH
- Young sheep used to be hardy at first? Nonsense
- Motorbike was taken by husband? Nonsense!
- Rubbish place to clean a pig?
- Tree on corner with rot
- Used to be protected by pig and horse? Nonsense
- Bull and pig clean
- Keep exclusively clean rubbish!
- Corner used to be hard for bunk
- School right to leave hospital garbage
- Bunk wife included in house rent
Buddy explains!

The straight part
We know that "rubbish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rubbish = hogwash.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 HOGWASH mean?
HOGWASH noun- Foolish talk or writing; nonsense.
- A mixture of solid and liquid food scraps fed to pigs; swill.