The most common and most likely answer to this crossword clue is the 6 letter word FIVERS
I've seen this crossword clue in The Daily Telegraph
F
I
V
E
R
S
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 FIVERS mean?
FIVERS noun- A banknote with a value of five units of currency.
- (by extension) The value in money that this represents.
- A clenched fist.
- A mathematical puzzle played on a 5 × 5 grid.
- A Zaydi Shiite Muslim, who disagrees with the majority of Shiites on the identity of the Fifth Imam.
- A person who gives five percent of their income or five hours a week of their time to charity (a reduction of ten percent tithing).