The most common and most likely answer to this crossword clue is the 4 plus 6 plus 4 letter word JOHN STUART MILL
J
O
H
N
S
T
U
A
R
T
M
I
L
L
More clues leading to the result JOHN STUART MILL
Buddy explains!
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.