The most common and most likely answer to this crossword clue is the 5 letter word PLEBS
P
L
E
B
S
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The straight part
We know that "common people" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case common people = plebs.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 PLEBS mean?
PLEBS noun- A commoner, a member of the lower class of a society.
- A common person, an unsophisticated or cultureless person.
- (usually derogatory) A freshman cadet at a military academy.
- The plebeian class of Ancient Rome.
- The common people, especially the mob.