The most common and most likely answer to this crossword clue is the 7 letter word CASUALS
I've seen this crossword clue in The Guardian
C
A
S
U
A
L
S
Buddy explains!
The straight part
We know that "Occasional workers might wear these" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case occasional workers might wear these = casuals.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 CASUALS mean?
CASUALS noun- A worker who is only working for a company occasionally, not as its permanent employee.
- A soldier temporarily at a place of duty, usually en route to another place of duty.
- A member of a group of football hooligans who wear expensive designer clothing to avoid police attention; see casual (subculture).
- One who receives relief for a night in a parish to which he does not belong; a vagrant.
- A player of casual games.
- A person whose engagement with media is relaxed or superficial.
- A tramp.