The most common and most likely answer to this crossword clue is the 7 letter word CURIOUS
I've seen this crossword clue in The Daily Telegraph
C
U
R
I
O
U
S
More clues leading to the result CURIOUS
- Contemptible scoundrel promises to pay? Strange
- Copper’s bringing posh Spanish banker in for questioning
- Rogue gets debts sustaining a lot of interest
- Unusual when a scoundrel promises to pay
- Funny dog is out endlessly barking
- Questioning former Northern Irish police’s mounting debts
- Inquisitive writer quits destitute for Conservative
- Peculiar scoundrel with admissions of debt
- Asking questions, seeing scoundrels covering evidence of debt
- Strange dog is running round Oxford University
Buddy explains!

The straight part
We know that "Peculiar" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case peculiar = curious.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 CURIOUS mean?
CURIOUS adjective- Tending to ask questions, or to want to explore or investigate; inquisitive; (with a negative connotation) nosy, prying.
- Caused by curiosity.
- Leading one to ask questions about; somewhat odd, out of the ordinary, or unusual.
- Careful, fastidious, particular; (specifically) demanding a high standard of excellence, difficult to satisfy.
- Carefully or artfully constructed; made with great elegance or skill.