The most common and most likely answer to this crossword clue is the 7 letter word SLATERS
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More clues leading to the result SLATERS
Buddy explains!
The straight part
We know that "They rebuke/people found on roofs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they rebuke/people found on roofs = slaters.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 SLATERS mean?
SLATERS noun- One who lays slates, or whose occupation is to slate buildings.
- Any terrestrial isopod crustacean of the genus Porcellio and allied genera; a woodlouse.
- A harsh critic; one who slates or denigrates something.