The most common and most likely answer to this crossword clue is the 6 letter word BABOON
I've seen this crossword clue in The Guardian
B
A
B
O
O
N
More clues leading to the result BABOON
- Prohibition involving shout that startles monkey
- Stupid person gives graduate advantage
- Source of bananas, a blessing for a monkey
- Outlaw receives word that may surprise 24
- Bishop displacing Nazis in instrument for primate
- A bishop in favour as primate
- From airline, gift for primate
- Primate beginning to bestow a blessing
- A book in favour for wild swinger?
- Primate could give bishop a blessing
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 BABOON mean?
BABOON noun- An Old World monkey of the genus Papio, having dog-like muzzles and large canine teeth, cheek pouches, a short tail, and naked callosities on the buttocks.
- A foolish or boorish person.