The most common and most likely answer to this crossword clue is the 4 plus 6 letter word BLUE COLLAR
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Buddy explains!
The straight part
We know that "working class/s" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case working class/s = blue collar.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 BLUE COLLAR mean?
BLUE COLLAR adjective- Working class; engaged or trained in essentially manual labor.
- Pertaining to the culture of blue-collar workers.