The most common and most likely answer to this crossword clue is the 5 letter word DAILY
I've seen this crossword clue in The Guardian
D
A
I
L
Y
More clues leading to the result DAILY
- Be sick in back yard regularly
- Greek work rejects independent, backing unknown cleaner
- Cleaner in Irish house close to Killarney
- Cleaner rag?
- Food outlet is changing hands on a regular basis
- Char paper, of a sort
- Lydia comes round regularly
- One lady is seen wandering round regularly
- Lady I employed
- . Maid: One welcomed by lady in trouble
Buddy explains!

The straight part
We know that "cleaner" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cleaner = daily.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 DAILY mean?
DAILY noun- Something that is produced, consumed, used, or done every day.
- To drive an automobile frequently, on a daily basis, for regular and mundane tasks.
- That occurs every day, or at least every working day
- Diurnal, by daylight, as opposed to nightly
- Quotidianly, every day
- Diurnally, by daylight