The most common and most likely answer to this crossword clue is the 7 letter word FOREMAN
I've seen this crossword clue in The Sunday Telegraph
F
O
R
E
M
A
N
More clues leading to the result FOREMAN
- Male supervisor in favour of elevated title
- Supervisor in favour of returning call
- Warning on course with staff supervisor
- Fellow in charge supporting rising celebrity
- Pro celebrity turned up as leader of crew
- Odd name for gang leader
- Manager promoting celebrity turned up
- One in charge warning worker
- Warning a bloke he is in charge
- Supervisor, one in favour of Oriental worker
Buddy explains!

The straight part
We know that "leader of crew" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case leader of crew = foreman.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 FOREMAN mean?
FOREMAN noun- The leader of a work crew.
- The member of a jury who presides over it and speaks on its behalf.
- (during the era of slavery) A black (slave) assistant to the white overseer who managed field hands.