The most common and most likely answer to this crossword clue is the 8 letter word EMBOLDEN
I've seen this crossword clue in Financial Times
E
M
B
O
L
D
E
N
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.
What does EMBOLDEN mean?
EMBOLDEN verb- To render (someone) bolder or more courageous.
- To encourage, inspire, or motivate.
- To format text in boldface.