The most common and most likely answer to this crossword clue is the 6 letter word GUVNOR
G
U
V
N
O
R
More clues leading to the result GUVNOR
Buddy explains!

The straight part
We know that "the /boss" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case the /boss = guvnor.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 GUVNOR mean?
GUVNOR noun- An informal form of address; see guv. This version is especially likely to be applied to the owner of a business or the landlord of a public house.