The most common and most likely answer to this crossword clue is the 6 letter word RAGMEN
I've seen this crossword clue in The Times
R
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M
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More clues leading to the result RAGMEN
Buddy explains!
The straight part
We know that "Chaps involved in junk trade" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chaps involved in junk trade = ragmen.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 RAGMEN mean?
RAGMEN noun- A person who collects and sells unwanted household items such as rags and other refuse for a living, a rag and bone man.