The most common and most likely answer to this crossword clue is the 3 letter word BUY
I've seen this crossword clue in Independent
B
U
Y
More clues leading to the result BUY
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 BUY mean?
BUY noun- Something which is bought; a purchase.
- To obtain (something) in exchange for money or goods
- To obtain by some sacrifice.
- To bribe.
- To be equivalent to in value.
- To accept as true; to believe
- To make a purchase or purchases, to treat (for a meal)
- To make a bluff, usually a large one.