The most common and most likely answer to this crossword clue is the 6 letter word HONCHO
I've seen this crossword clue in Independent
H
O
N
C
H
O
More clues leading to the result HONCHO
- Big cheese sandwich on cholesterol-packed wraps
- Reaction to gag about new Conservative leader
- Boss issuing repeated call to attend – no charge included
- Church accepted distinction without hesitation for leader
- Top man contributing to research on cholera
- Laughter about state school’s study course head
- Top man perhaps for a laugh round North Carolina
- American boss has repeated laugh about North Carolina
- Boss tucking into horseradish on chops
- Boss only half truthful leading company, hard to get nailed
Buddy explains!

The straight part
We know that "Top man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case top man = honcho.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 HONCHO mean?
HONCHO noun- Boss, leader
- To lead or manage.