The most common and most likely answer to this crossword clue is the 7 letter word HOOVERS
I've seen this crossword clue in The Guardian
H
O
O
V
E
R
S
More clues leading to the result HOOVERS
Buddy explains!
The straight part
We know that "Cleans" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cleans = hoovers.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 HOOVERS mean?
HOOVERS noun- A vacuum cleaner, irrespective of brand.
- To clean (a room, etc.) with a vacuum cleaner, irrespective of brand.
- To use a vacuum cleaner, irrespective of brand.
- To suck in or inhale, as if by a vacuum cleaner.