The most common and most likely answer to this crossword clue is the 6 letter word KINGLY
I've seen this crossword clue in The Times
K
I
N
G
L
Y
Buddy explains!
The straight part
We know that "like the top man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like the top man = kingly.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 KINGLY mean?
KINGLY adjective- Of or belonging to a king or kings; exercised by a king.
- Characteristic of kings, majestic, regal.
- In a royal manner.