The most common and most likely answer to this crossword clue is the 3 letter word BEN
B
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 BEN mean?
BEN noun- A prayer; a petition.
- Ben-room: The inner room of a two-room hut or shack (as opposed to the but).
- Inner, interior.
- Inside.
- In, into.
- A tree, Moringa oleifera or horseradish tree of Arabia and India, which produces oil of ben.
- The winged seed of the ben tree.
- The oil of the ben seed.
- (usually capitalised) Son of (used with Hebrew and Arabic surnames).
- A Scottish or Irish mountain or high peak.
- Good.