The most common and most likely answer to this crossword clue is the 11 letter word RECRUITMENT
I've seen this crossword clue in Financial Times
R
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More clues leading to the result RECRUITMENT
Buddy explains!

The straight part
We know that "bringing people on board" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bringing people on board = recruitment.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 RECRUITMENT mean?
RECRUITMENT noun- The process or art of finding candidates for a post in an organization, or recruits for the armed forces.
- A style or process of recruiting.
- The addition of new recruits to a population.
- The full aeration of a lung.