The most common and most likely answer to this crossword clue is the 14 letter word STRIKEBREAKERS
I've seen this crossword clue in The Sunday Telegraph
S
T
R
I
K
E
B
R
E
A
K
E
R
S
More clues leading to the result STRIKEBREAKERS
Buddy explains!
The straight part
We know that "those going in while others out?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case those going in while others out? = strikebreakers.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 STRIKEBREAKERS mean?
STRIKEBREAKERS noun- A non-unionized worker hired to replace a striking union worker.