The most common and most likely answer to this crossword clue is the 3 letter word LOL
L
O
L
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 LOL mean?
LOL noun- (British commonwealth) Loyal Orange Lodge, a prefix given to all branches of the Loyal Orange Order. For example, LOL 1 is Portadown branch.
- (sometimes derogatory) Little old lady.
- To laugh out loud.
- Laughing (or laugh) out loud.
- Lots of laughs. (occasionally used)
- (by dilution) Indicates light-heartedness or amusement, or that the accompanying statement is not intended as serious.
- (letter-writing) Lots of love.
- Used in song as a nonsense syllable.