The most common and most likely answer to this crossword clue is the 10 letter word HARBOURING
I've seen this crossword clue in Financial Times
H
A
R
B
O
U
R
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.
What does HARBOURING mean?
HARBOURING verb- To provide a harbor or safe place for.
- To take refuge or shelter in a protected expanse of water.
- To drive (a hunted stag) to covert.
- To hold or persistently entertain in one's thoughts or mind.