The most common and most likely answer to this crossword clue is the 10 letter word ASSISTANTS
I've seen this crossword clue in The Daily Telegraph
A
S
S
I
S
T
A
N
T
S
More clues leading to the result ASSISTANTS
- Those attending function entertained by jazzmen, bishop having left
- Silly workers maybe must welcome first people helping
- Associates fool with first workers
- Idiot workers must accept first people who help
- Donkey is ultimately important to underground workers and helpers
- As young lass is sittin' on whale, 'tis heartless to them as helps?
Buddy explains!

The straight part
We know that "people who help" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case people who help = assistants.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 ASSISTANTS mean?
ASSISTANTS noun- Someone who is present; a bystander, a witness.
- A person who assists or helps someone else.
- Sales assistant.
- A software tool that provides assistance in some task, a wizard program.