The most common and most likely answer to this crossword clue is the 4 letter word MUNI
M
U
N
I
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 MUNI mean?
MUNI noun- A municipal bond.
- A facility operated by a municipal government, such as a golf course or train line.
- The municipal government / municipality
- (often italicized) A Jain or Buddhist ascetic who has taken a vow of silence