The most common and most likely answer to this crossword clue is the 5 letter word BLUFF
B
L
U
F
F
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 BLUFF mean?
BLUFF noun- An act of bluffing; a false expression of the strength of one's position in order to intimidate; braggadocio.
- An attempt to represent oneself as holding a stronger hand than one actually does.
- The card game poker.
- One who bluffs; a bluffer.
- An excuse.
- To make a bluff; to give the impression that one's hand is stronger than it is.
- (by analogy) To frighten or deter with a false show of strength or confidence; to give a false impression of strength or temerity in order to intimidate and gain some advantage.
- To take advantage by bluffing.
- A high, steep bank, for example by a river or the sea, or beside a ravine or plain; a cliff with a broad face.
- A small wood or stand of trees, typically poplar or willow.
- Having a broad, flattened front.
- Rising steeply with a flat or rounded front.
- Surly; churlish; gruff; rough.
- Roughly frank and hearty in one's manners.
- To fluff, puff or swell up.