The most common and most likely answer to this crossword clue is the 11 letter word ITALICISING
I
T
A
L
I
C
I
S
I
N
G
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.
Crossword Answer definitions
ITALICISING verb- To put into italics.
- To emphasize.